/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 15:10:12,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 15:10:12,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 15:10:12,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 15:10:12,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 15:10:12,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 15:10:12,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 15:10:12,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 15:10:12,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 15:10:12,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 15:10:12,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 15:10:12,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-03 15:10:12,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 15:10:12,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 15:10:12,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 15:10:12,719 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 15:10:12,720 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 15:10:12,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 15:10:12,721 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 15:10:12,721 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 15:10:12,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 15:10:12,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 15:10:12,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 15:10:12,723 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 15:10:12,763 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 15:10:12,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 15:10:12,763 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 15:10:12,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 15:10:12,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 15:10:12,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 15:10:12,767 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 15:10:12,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 15:10:12,767 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 15:10:12,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 15:10:12,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 15:10:12,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 15:10:12,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 15:10:12,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 15:10:12,769 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 15:10:12,769 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 15:10:12,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 15:10:12,769 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 15:10:12,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 15:10:12,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 15:10:12,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 15:10:12,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 15:10:12,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 15:10:12,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:10:12,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 15:10:12,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 15:10:12,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 15:10:12,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 15:10:12,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 15:10:12,770 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 15:10:12,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 15:10:12,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 15:10:13,079 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 15:10:13,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 15:10:13,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 15:10:13,104 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 15:10:13,105 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 15:10:13,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2021-05-03 15:10:13,106 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2021-05-03 15:10:13,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 15:10:13,149 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 15:10:13,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 15:10:13,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 15:10:13,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 15:10:13,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... [2021-05-03 15:10:13,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... [2021-05-03 15:10:13,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 15:10:13,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 15:10:13,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 15:10:13,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 15:10:13,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... [2021-05-03 15:10:13,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... [2021-05-03 15:10:13,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... [2021-05-03 15:10:13,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... [2021-05-03 15:10:13,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... [2021-05-03 15:10:13,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... [2021-05-03 15:10:13,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... [2021-05-03 15:10:13,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 15:10:13,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 15:10:13,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 15:10:13,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 15:10:13,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 15:10:13,288 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 15:10:13,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 15:10:13,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 15:10:13,289 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 15:10:13,289 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 15:10:13,289 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 15:10:13,289 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 15:10:13,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 15:10:13,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 15:10:13,290 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-03 15:10:13,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-03 15:10:13,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-03 15:10:13,290 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-03 15:10:13,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-03 15:10:13,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-03 15:10:13,290 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-05-03 15:10:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-05-03 15:10:13,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-05-03 15:10:13,291 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-05-03 15:10:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-05-03 15:10:13,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-05-03 15:10:13,292 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 15:10:13,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 15:10:13,549 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-03 15:10:13,550 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-03 15:10:13,551 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-05-03 15:10:13,551 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-05-03 15:10:13,551 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-05-03 15:10:13,552 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:10:13 BoogieIcfgContainer [2021-05-03 15:10:13,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 15:10:13,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 15:10:13,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 15:10:13,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 15:10:13,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 03:10:13" (1/2) ... [2021-05-03 15:10:13,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ec79021 and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 03:10:13, skipping insertion in model container [2021-05-03 15:10:13,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 03:10:13" (2/2) ... [2021-05-03 15:10:13,574 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2021-05-03 15:10:13,590 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 15:10:13,590 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 15:10:13,593 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 15:10:13,594 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 15:10:13,766 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-05-03 15:10:13,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-05-03 15:10:13,818 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 15:10:13,819 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 15:10:13,819 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 15:10:13,819 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 15:10:13,819 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 15:10:13,819 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 15:10:13,819 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 15:10:13,819 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 15:10:13,837 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-05-03 15:10:13,884 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:13,887 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:10:13,908 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:13,908 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:13,909 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1598114992, now seen corresponding path program 1 times [2021-05-03 15:10:13,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:13,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600396903] [2021-05-03 15:10:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:14,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600396903] [2021-05-03 15:10:14,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:10:14,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:10:14,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936962234] [2021-05-03 15:10:14,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:10:14,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:14,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:10:14,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:10:14,215 INFO L87 Difference]: Start difference. First operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:14,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:14,369 INFO L93 Difference]: Finished difference Result 893 states and 3368 transitions. [2021-05-03 15:10:14,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:10:14,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 15:10:14,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:14,405 INFO L225 Difference]: With dead ends: 893 [2021-05-03 15:10:14,405 INFO L226 Difference]: Without dead ends: 874 [2021-05-03 15:10:14,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:10:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-05-03 15:10:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2021-05-03 15:10:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2021-05-03 15:10:14,534 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2021-05-03 15:10:14,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:14,538 INFO L480 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2021-05-03 15:10:14,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:14,539 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2021-05-03 15:10:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 15:10:14,543 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:14,543 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:14,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 15:10:14,544 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:14,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:14,549 INFO L82 PathProgramCache]: Analyzing trace with hash -841782840, now seen corresponding path program 2 times [2021-05-03 15:10:14,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:14,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381079655] [2021-05-03 15:10:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:14,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381079655] [2021-05-03 15:10:14,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:10:14,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 15:10:14,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202859417] [2021-05-03 15:10:14,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 15:10:14,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:14,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 15:10:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:10:14,702 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:14,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:14,786 INFO L93 Difference]: Finished difference Result 872 states and 3319 transitions. [2021-05-03 15:10:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:10:14,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-03 15:10:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:14,792 INFO L225 Difference]: With dead ends: 872 [2021-05-03 15:10:14,793 INFO L226 Difference]: Without dead ends: 841 [2021-05-03 15:10:14,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:10:14,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-05-03 15:10:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2021-05-03 15:10:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2021-05-03 15:10:14,824 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2021-05-03 15:10:14,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:14,825 INFO L480 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2021-05-03 15:10:14,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:14,825 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2021-05-03 15:10:14,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:10:14,827 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:14,827 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:14,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 15:10:14,828 INFO L428 AbstractCegarLoop]: === Iteration 3 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:14,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:14,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1312476017, now seen corresponding path program 1 times [2021-05-03 15:10:14,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:14,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172271362] [2021-05-03 15:10:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:14,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172271362] [2021-05-03 15:10:14,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109420806] [2021-05-03 15:10:14,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:14,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:10:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:15,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:15,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-03 15:10:15,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-05-03 15:10:15,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638675480] [2021-05-03 15:10:15,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:10:15,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:15,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:10:15,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:10:15,123 INFO L87 Difference]: Start difference. First operand 596 states and 2241 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:15,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:15,177 INFO L93 Difference]: Finished difference Result 867 states and 3197 transitions. [2021-05-03 15:10:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:10:15,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:10:15,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:15,184 INFO L225 Difference]: With dead ends: 867 [2021-05-03 15:10:15,184 INFO L226 Difference]: Without dead ends: 836 [2021-05-03 15:10:15,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:10:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-05-03 15:10:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2021-05-03 15:10:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2021-05-03 15:10:15,220 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2021-05-03 15:10:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:15,221 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2021-05-03 15:10:15,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2021-05-03 15:10:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:10:15,224 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:15,224 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:15,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-03 15:10:15,447 INFO L428 AbstractCegarLoop]: === Iteration 4 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:15,448 INFO L82 PathProgramCache]: Analyzing trace with hash 731220239, now seen corresponding path program 2 times [2021-05-03 15:10:15,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:15,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316806726] [2021-05-03 15:10:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:15,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316806726] [2021-05-03 15:10:15,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:10:15,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:10:15,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472735955] [2021-05-03 15:10:15,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:10:15,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:15,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:10:15,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:10:15,477 INFO L87 Difference]: Start difference. First operand 734 states and 2834 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:15,510 INFO L93 Difference]: Finished difference Result 736 states and 2873 transitions. [2021-05-03 15:10:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 15:10:15,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:10:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:15,515 INFO L225 Difference]: With dead ends: 736 [2021-05-03 15:10:15,515 INFO L226 Difference]: Without dead ends: 655 [2021-05-03 15:10:15,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:10:15,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-05-03 15:10:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 571. [2021-05-03 15:10:15,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.8526315789473684) internal successors, (2196), 570 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 2196 transitions. [2021-05-03 15:10:15,537 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 2196 transitions. Word has length 27 [2021-05-03 15:10:15,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:15,537 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 2196 transitions. [2021-05-03 15:10:15,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 2196 transitions. [2021-05-03 15:10:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:10:15,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:15,539 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:15,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 15:10:15,540 INFO L428 AbstractCegarLoop]: === Iteration 5 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:15,540 INFO L82 PathProgramCache]: Analyzing trace with hash 96535007, now seen corresponding path program 1 times [2021-05-03 15:10:15,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:15,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624703493] [2021-05-03 15:10:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624703493] [2021-05-03 15:10:15,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435664267] [2021-05-03 15:10:15,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:15,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-03 15:10:15,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:15,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:15,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:15,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-05-03 15:10:15,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413669162] [2021-05-03 15:10:15,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-03 15:10:15,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:15,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-03 15:10:15,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-03 15:10:15,812 INFO L87 Difference]: Start difference. First operand 571 states and 2196 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:15,892 INFO L93 Difference]: Finished difference Result 1547 states and 6017 transitions. [2021-05-03 15:10:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 15:10:15,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:10:15,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:15,903 INFO L225 Difference]: With dead ends: 1547 [2021-05-03 15:10:15,903 INFO L226 Difference]: Without dead ends: 1487 [2021-05-03 15:10:15,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:10:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-05-03 15:10:15,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1102. [2021-05-03 15:10:15,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 4.049046321525886) internal successors, (4458), 1101 states have internal predecessors, (4458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 4458 transitions. [2021-05-03 15:10:15,951 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 4458 transitions. Word has length 27 [2021-05-03 15:10:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:15,951 INFO L480 AbstractCegarLoop]: Abstraction has 1102 states and 4458 transitions. [2021-05-03 15:10:15,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 4458 transitions. [2021-05-03 15:10:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 15:10:15,956 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:15,956 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:16,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:16,169 INFO L428 AbstractCegarLoop]: === Iteration 6 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:16,170 INFO L82 PathProgramCache]: Analyzing trace with hash 55195285, now seen corresponding path program 2 times [2021-05-03 15:10:16,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:16,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223967519] [2021-05-03 15:10:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:16,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:16,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223967519] [2021-05-03 15:10:16,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 15:10:16,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 15:10:16,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504421996] [2021-05-03 15:10:16,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 15:10:16,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:16,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 15:10:16,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 15:10:16,216 INFO L87 Difference]: Start difference. First operand 1102 states and 4458 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:16,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:16,254 INFO L93 Difference]: Finished difference Result 1138 states and 4516 transitions. [2021-05-03 15:10:16,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 15:10:16,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-05-03 15:10:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:16,269 INFO L225 Difference]: With dead ends: 1138 [2021-05-03 15:10:16,269 INFO L226 Difference]: Without dead ends: 1096 [2021-05-03 15:10:16,270 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 15:10:16,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-05-03 15:10:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1081. [2021-05-03 15:10:16,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 4.053703703703704) internal successors, (4378), 1080 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:16,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 4378 transitions. [2021-05-03 15:10:16,315 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 4378 transitions. Word has length 27 [2021-05-03 15:10:16,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:16,316 INFO L480 AbstractCegarLoop]: Abstraction has 1081 states and 4378 transitions. [2021-05-03 15:10:16,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:16,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 4378 transitions. [2021-05-03 15:10:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:16,324 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:16,324 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:16,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 15:10:16,324 INFO L428 AbstractCegarLoop]: === Iteration 7 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:16,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:16,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1221830146, now seen corresponding path program 1 times [2021-05-03 15:10:16,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:16,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405657896] [2021-05-03 15:10:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:16,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405657896] [2021-05-03 15:10:16,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416164815] [2021-05-03 15:10:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:16,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:16,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:16,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-05-03 15:10:16,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:16,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:16,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:16,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-05-03 15:10:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:16,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:16,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-05-03 15:10:16,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604586703] [2021-05-03 15:10:16,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:16,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:16,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:16,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:16,920 INFO L87 Difference]: Start difference. First operand 1081 states and 4378 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:17,754 INFO L93 Difference]: Finished difference Result 1609 states and 6465 transitions. [2021-05-03 15:10:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:10:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:17,767 INFO L225 Difference]: With dead ends: 1609 [2021-05-03 15:10:17,767 INFO L226 Difference]: Without dead ends: 1590 [2021-05-03 15:10:17,768 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 708.9ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:10:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2021-05-03 15:10:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1178. [2021-05-03 15:10:17,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 4.045029736618521) internal successors, (4761), 1177 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 4761 transitions. [2021-05-03 15:10:17,817 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 4761 transitions. Word has length 29 [2021-05-03 15:10:17,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:17,817 INFO L480 AbstractCegarLoop]: Abstraction has 1178 states and 4761 transitions. [2021-05-03 15:10:17,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:17,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 4761 transitions. [2021-05-03 15:10:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:17,821 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:17,821 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:18,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:18,045 INFO L428 AbstractCegarLoop]: === Iteration 8 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:18,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:18,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1456540984, now seen corresponding path program 2 times [2021-05-03 15:10:18,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:18,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62315406] [2021-05-03 15:10:18,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:18,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:18,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62315406] [2021-05-03 15:10:18,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406036306] [2021-05-03 15:10:18,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:18,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:18,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:18,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:18,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:18,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:18,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:10:18,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:18,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:18,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:18,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:10:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:18,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:18,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 15:10:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948224840] [2021-05-03 15:10:18,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:18,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:18,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:18,587 INFO L87 Difference]: Start difference. First operand 1178 states and 4761 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:18,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:18,981 INFO L93 Difference]: Finished difference Result 1621 states and 6497 transitions. [2021-05-03 15:10:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:10:18,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:18,993 INFO L225 Difference]: With dead ends: 1621 [2021-05-03 15:10:18,994 INFO L226 Difference]: Without dead ends: 1602 [2021-05-03 15:10:18,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:10:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-05-03 15:10:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1181. [2021-05-03 15:10:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 1180 states have (on average 4.043220338983051) internal successors, (4771), 1180 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:19,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 4771 transitions. [2021-05-03 15:10:19,041 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 4771 transitions. Word has length 29 [2021-05-03 15:10:19,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:19,041 INFO L480 AbstractCegarLoop]: Abstraction has 1181 states and 4771 transitions. [2021-05-03 15:10:19,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 4771 transitions. [2021-05-03 15:10:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:19,046 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:19,046 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:19,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:19,268 INFO L428 AbstractCegarLoop]: === Iteration 9 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2020138408, now seen corresponding path program 3 times [2021-05-03 15:10:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:19,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808030819] [2021-05-03 15:10:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:19,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808030819] [2021-05-03 15:10:19,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815303616] [2021-05-03 15:10:19,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:19,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:10:19,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:19,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:19,600 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:19,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:10:19,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:19,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:19,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:19,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:10:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:19,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:19,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 15:10:19,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610133735] [2021-05-03 15:10:19,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:19,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:19,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:19,709 INFO L87 Difference]: Start difference. First operand 1181 states and 4771 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:20,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:20,026 INFO L93 Difference]: Finished difference Result 1651 states and 6563 transitions. [2021-05-03 15:10:20,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:10:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:20,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:20,037 INFO L225 Difference]: With dead ends: 1651 [2021-05-03 15:10:20,037 INFO L226 Difference]: Without dead ends: 1632 [2021-05-03 15:10:20,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:10:20,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-05-03 15:10:20,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1188. [2021-05-03 15:10:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 4.037068239258635) internal successors, (4792), 1187 states have internal predecessors, (4792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:20,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 4792 transitions. [2021-05-03 15:10:20,078 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 4792 transitions. Word has length 29 [2021-05-03 15:10:20,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:20,079 INFO L480 AbstractCegarLoop]: Abstraction has 1188 states and 4792 transitions. [2021-05-03 15:10:20,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:20,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 4792 transitions. [2021-05-03 15:10:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:20,083 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:20,083 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:20,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:20,297 INFO L428 AbstractCegarLoop]: === Iteration 10 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:20,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1903603882, now seen corresponding path program 4 times [2021-05-03 15:10:20,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:20,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112447127] [2021-05-03 15:10:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:20,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112447127] [2021-05-03 15:10:20,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773011150] [2021-05-03 15:10:20,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:20,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:10:20,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:20,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-05-03 15:10:20,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:20,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:20,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:20,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-05-03 15:10:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:20,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:20,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-05-03 15:10:20,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87459975] [2021-05-03 15:10:20,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:20,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:20,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:20,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:20,702 INFO L87 Difference]: Start difference. First operand 1188 states and 4792 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:21,524 INFO L93 Difference]: Finished difference Result 2219 states and 8737 transitions. [2021-05-03 15:10:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:10:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:21,553 INFO L225 Difference]: With dead ends: 2219 [2021-05-03 15:10:21,554 INFO L226 Difference]: Without dead ends: 2195 [2021-05-03 15:10:21,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 592.1ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:10:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-05-03 15:10:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1309. [2021-05-03 15:10:21,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 4.077981651376147) internal successors, (5334), 1308 states have internal predecessors, (5334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:21,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 5334 transitions. [2021-05-03 15:10:21,600 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 5334 transitions. Word has length 29 [2021-05-03 15:10:21,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:21,601 INFO L480 AbstractCegarLoop]: Abstraction has 1309 states and 5334 transitions. [2021-05-03 15:10:21,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:21,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 5334 transitions. [2021-05-03 15:10:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:21,605 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:21,605 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:21,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:21,827 INFO L428 AbstractCegarLoop]: === Iteration 11 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:21,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:21,828 INFO L82 PathProgramCache]: Analyzing trace with hash 235210440, now seen corresponding path program 5 times [2021-05-03 15:10:21,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:21,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915419166] [2021-05-03 15:10:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:21,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915419166] [2021-05-03 15:10:21,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535552193] [2021-05-03 15:10:21,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:21,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:21,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:10:21,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:22,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-05-03 15:10:22,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:22,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:22,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:22,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-05-03 15:10:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:22,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:22,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-05-03 15:10:22,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787327827] [2021-05-03 15:10:22,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:10:22,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:22,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:10:22,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:10:22,199 INFO L87 Difference]: Start difference. First operand 1309 states and 5334 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:22,915 INFO L93 Difference]: Finished difference Result 2266 states and 8868 transitions. [2021-05-03 15:10:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:10:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:22,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:22,926 INFO L225 Difference]: With dead ends: 2266 [2021-05-03 15:10:22,926 INFO L226 Difference]: Without dead ends: 2217 [2021-05-03 15:10:22,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:10:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-05-03 15:10:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 1273. [2021-05-03 15:10:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 4.084119496855346) internal successors, (5195), 1272 states have internal predecessors, (5195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 5195 transitions. [2021-05-03 15:10:22,979 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 5195 transitions. Word has length 29 [2021-05-03 15:10:22,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:22,979 INFO L480 AbstractCegarLoop]: Abstraction has 1273 states and 5195 transitions. [2021-05-03 15:10:22,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 5195 transitions. [2021-05-03 15:10:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:22,984 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:22,984 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:23,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:23,207 INFO L428 AbstractCegarLoop]: === Iteration 12 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:23,208 INFO L82 PathProgramCache]: Analyzing trace with hash -986184770, now seen corresponding path program 6 times [2021-05-03 15:10:23,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:23,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458423479] [2021-05-03 15:10:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:23,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458423479] [2021-05-03 15:10:23,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070073411] [2021-05-03 15:10:23,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:23,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:10:23,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:23,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 15:10:23,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:23,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:23,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:10:23,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:23,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:23,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:23,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-05-03 15:10:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:23,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:23,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-03 15:10:23,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304604672] [2021-05-03 15:10:23,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:23,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:23,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:23,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:23,797 INFO L87 Difference]: Start difference. First operand 1273 states and 5195 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:25,006 INFO L93 Difference]: Finished difference Result 2135 states and 8580 transitions. [2021-05-03 15:10:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:10:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:25,013 INFO L225 Difference]: With dead ends: 2135 [2021-05-03 15:10:25,013 INFO L226 Difference]: Without dead ends: 2116 [2021-05-03 15:10:25,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1089.6ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 15:10:25,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-05-03 15:10:25,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1261. [2021-05-03 15:10:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 4.086507936507936) internal successors, (5149), 1260 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 5149 transitions. [2021-05-03 15:10:25,056 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 5149 transitions. Word has length 29 [2021-05-03 15:10:25,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:25,056 INFO L480 AbstractCegarLoop]: Abstraction has 1261 states and 5149 transitions. [2021-05-03 15:10:25,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:25,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 5149 transitions. [2021-05-03 15:10:25,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:25,061 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:25,061 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:25,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-03 15:10:25,281 INFO L428 AbstractCegarLoop]: === Iteration 13 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:25,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:25,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1050279366, now seen corresponding path program 7 times [2021-05-03 15:10:25,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:25,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688580825] [2021-05-03 15:10:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:25,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688580825] [2021-05-03 15:10:25,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107274831] [2021-05-03 15:10:25,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:25,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:25,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 15:10:25,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:25,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:25,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:25,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-05-03 15:10:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:25,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:25,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-05-03 15:10:25,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957942497] [2021-05-03 15:10:25,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:25,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:25,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:25,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:25,731 INFO L87 Difference]: Start difference. First operand 1261 states and 5149 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:26,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:26,454 INFO L93 Difference]: Finished difference Result 1597 states and 6455 transitions. [2021-05-03 15:10:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:10:26,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:26,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:26,461 INFO L225 Difference]: With dead ends: 1597 [2021-05-03 15:10:26,462 INFO L226 Difference]: Without dead ends: 1582 [2021-05-03 15:10:26,462 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:10:26,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-05-03 15:10:26,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1300. [2021-05-03 15:10:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 4.091608929946112) internal successors, (5315), 1299 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:26,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 5315 transitions. [2021-05-03 15:10:26,499 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 5315 transitions. Word has length 29 [2021-05-03 15:10:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:26,499 INFO L480 AbstractCegarLoop]: Abstraction has 1300 states and 5315 transitions. [2021-05-03 15:10:26,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:26,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 5315 transitions. [2021-05-03 15:10:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:26,504 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:26,504 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:26,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:26,721 INFO L428 AbstractCegarLoop]: === Iteration 14 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1403418856, now seen corresponding path program 8 times [2021-05-03 15:10:26,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:26,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719271017] [2021-05-03 15:10:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:26,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719271017] [2021-05-03 15:10:26,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947876723] [2021-05-03 15:10:26,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:26,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:26,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:26,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:10:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:26,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 15:10:26,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:26,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:26,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:26,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-05-03 15:10:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:27,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:27,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-05-03 15:10:27,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153793590] [2021-05-03 15:10:27,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:10:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:27,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:10:27,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:10:27,095 INFO L87 Difference]: Start difference. First operand 1300 states and 5315 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:27,881 INFO L93 Difference]: Finished difference Result 2051 states and 8086 transitions. [2021-05-03 15:10:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:10:27,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:27,889 INFO L225 Difference]: With dead ends: 2051 [2021-05-03 15:10:27,889 INFO L226 Difference]: Without dead ends: 2021 [2021-05-03 15:10:27,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 640.9ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:10:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-05-03 15:10:27,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1413. [2021-05-03 15:10:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 4.106940509915014) internal successors, (5799), 1412 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 5799 transitions. [2021-05-03 15:10:27,932 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 5799 transitions. Word has length 29 [2021-05-03 15:10:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:27,932 INFO L480 AbstractCegarLoop]: Abstraction has 1413 states and 5799 transitions. [2021-05-03 15:10:27,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 5799 transitions. [2021-05-03 15:10:27,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:27,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:27,937 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:28,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-03 15:10:28,160 INFO L428 AbstractCegarLoop]: === Iteration 15 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:28,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1034313432, now seen corresponding path program 9 times [2021-05-03 15:10:28,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:28,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402911808] [2021-05-03 15:10:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:28,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402911808] [2021-05-03 15:10:28,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692286223] [2021-05-03 15:10:28,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:28,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:10:28,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:28,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:28,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:28,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:28,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:10:28,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:28,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:28,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:28,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:10:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:28,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:28,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 15:10:28,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363635171] [2021-05-03 15:10:28,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:10:28,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:28,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:10:28,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:10:28,539 INFO L87 Difference]: Start difference. First operand 1413 states and 5799 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:28,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:28,820 INFO L93 Difference]: Finished difference Result 1671 states and 6803 transitions. [2021-05-03 15:10:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:10:28,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:28,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:28,827 INFO L225 Difference]: With dead ends: 1671 [2021-05-03 15:10:28,827 INFO L226 Difference]: Without dead ends: 1657 [2021-05-03 15:10:28,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:10:28,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-05-03 15:10:28,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1413. [2021-05-03 15:10:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 4.106940509915014) internal successors, (5799), 1412 states have internal predecessors, (5799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 5799 transitions. [2021-05-03 15:10:28,872 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 5799 transitions. Word has length 29 [2021-05-03 15:10:28,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:28,872 INFO L480 AbstractCegarLoop]: Abstraction has 1413 states and 5799 transitions. [2021-05-03 15:10:28,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 5799 transitions. [2021-05-03 15:10:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:28,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:28,877 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:29,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-03 15:10:29,096 INFO L428 AbstractCegarLoop]: === Iteration 16 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:29,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1148225234, now seen corresponding path program 10 times [2021-05-03 15:10:29,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:29,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136118665] [2021-05-03 15:10:29,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:29,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136118665] [2021-05-03 15:10:29,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32463411] [2021-05-03 15:10:29,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:29,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:10:29,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:29,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:29,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:29,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 15:10:29,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:29,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:29,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:29,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-05-03 15:10:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:29,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:29,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-05-03 15:10:29,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337786493] [2021-05-03 15:10:29,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:29,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:29,489 INFO L87 Difference]: Start difference. First operand 1413 states and 5799 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:30,103 INFO L93 Difference]: Finished difference Result 2167 states and 8551 transitions. [2021-05-03 15:10:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:10:30,103 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:30,110 INFO L225 Difference]: With dead ends: 2167 [2021-05-03 15:10:30,110 INFO L226 Difference]: Without dead ends: 2122 [2021-05-03 15:10:30,111 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:10:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-05-03 15:10:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1415. [2021-05-03 15:10:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 4.128712871287129) internal successors, (5838), 1414 states have internal predecessors, (5838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 5838 transitions. [2021-05-03 15:10:30,155 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 5838 transitions. Word has length 29 [2021-05-03 15:10:30,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:30,155 INFO L480 AbstractCegarLoop]: Abstraction has 1415 states and 5838 transitions. [2021-05-03 15:10:30,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:30,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 5838 transitions. [2021-05-03 15:10:30,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:30,162 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:30,162 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:30,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-03 15:10:30,386 INFO L428 AbstractCegarLoop]: === Iteration 17 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:30,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:30,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1678080530, now seen corresponding path program 11 times [2021-05-03 15:10:30,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:30,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491900958] [2021-05-03 15:10:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:30,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491900958] [2021-05-03 15:10:30,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105603131] [2021-05-03 15:10:30,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:30,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:10:30,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:30,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:30,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:30,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:30,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:10:30,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:30,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:30,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:30,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:10:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:30,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:30,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:10:30,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724028718] [2021-05-03 15:10:30,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:10:30,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:30,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:10:30,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:10:30,802 INFO L87 Difference]: Start difference. First operand 1415 states and 5838 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:31,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:31,323 INFO L93 Difference]: Finished difference Result 1783 states and 7253 transitions. [2021-05-03 15:10:31,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:10:31,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:31,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:31,329 INFO L225 Difference]: With dead ends: 1783 [2021-05-03 15:10:31,330 INFO L226 Difference]: Without dead ends: 1768 [2021-05-03 15:10:31,330 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:10:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1768 states. [2021-05-03 15:10:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1768 to 1485. [2021-05-03 15:10:31,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 4.151617250673854) internal successors, (6161), 1484 states have internal predecessors, (6161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:31,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 6161 transitions. [2021-05-03 15:10:31,368 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 6161 transitions. Word has length 29 [2021-05-03 15:10:31,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:31,368 INFO L480 AbstractCegarLoop]: Abstraction has 1485 states and 6161 transitions. [2021-05-03 15:10:31,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:31,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 6161 transitions. [2021-05-03 15:10:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:31,372 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:31,372 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:31,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-03 15:10:31,585 INFO L428 AbstractCegarLoop]: === Iteration 18 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1489238964, now seen corresponding path program 12 times [2021-05-03 15:10:31,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:31,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240154740] [2021-05-03 15:10:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:31,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240154740] [2021-05-03 15:10:31,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074260041] [2021-05-03 15:10:31,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:31,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:10:31,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:31,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 15:10:31,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:31,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:31,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:10:31,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:31,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:31,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:31,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-05-03 15:10:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:31,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:31,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 15:10:31,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906340751] [2021-05-03 15:10:31,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:10:31,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:31,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:10:31,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:10:31,988 INFO L87 Difference]: Start difference. First operand 1485 states and 6161 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:32,404 INFO L93 Difference]: Finished difference Result 1854 states and 7503 transitions. [2021-05-03 15:10:32,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:10:32,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:32,410 INFO L225 Difference]: With dead ends: 1854 [2021-05-03 15:10:32,410 INFO L226 Difference]: Without dead ends: 1845 [2021-05-03 15:10:32,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:10:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2021-05-03 15:10:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1493. [2021-05-03 15:10:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 4.144101876675603) internal successors, (6183), 1492 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:32,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 6183 transitions. [2021-05-03 15:10:32,455 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 6183 transitions. Word has length 29 [2021-05-03 15:10:32,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:32,455 INFO L480 AbstractCegarLoop]: Abstraction has 1493 states and 6183 transitions. [2021-05-03 15:10:32,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:32,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 6183 transitions. [2021-05-03 15:10:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:32,459 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:32,459 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:32,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:32,673 INFO L428 AbstractCegarLoop]: === Iteration 19 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:32,673 INFO L82 PathProgramCache]: Analyzing trace with hash -179154478, now seen corresponding path program 13 times [2021-05-03 15:10:32,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:32,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833121323] [2021-05-03 15:10:32,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:32,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833121323] [2021-05-03 15:10:32,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664554129] [2021-05-03 15:10:32,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:32,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:32,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:32,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 15:10:32,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:32,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:32,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:32,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-05-03 15:10:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:33,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:33,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-05-03 15:10:33,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242749257] [2021-05-03 15:10:33,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:33,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:33,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:33,031 INFO L87 Difference]: Start difference. First operand 1493 states and 6183 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:33,701 INFO L93 Difference]: Finished difference Result 2369 states and 9422 transitions. [2021-05-03 15:10:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:10:33,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:33,708 INFO L225 Difference]: With dead ends: 2369 [2021-05-03 15:10:33,708 INFO L226 Difference]: Without dead ends: 2336 [2021-05-03 15:10:33,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:10:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-05-03 15:10:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1534. [2021-05-03 15:10:33,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 4.159165035877365) internal successors, (6376), 1533 states have internal predecessors, (6376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:33,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 6376 transitions. [2021-05-03 15:10:33,744 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 6376 transitions. Word has length 29 [2021-05-03 15:10:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:33,744 INFO L480 AbstractCegarLoop]: Abstraction has 1534 states and 6376 transitions. [2021-05-03 15:10:33,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 6376 transitions. [2021-05-03 15:10:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:33,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:33,749 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:33,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-03 15:10:33,965 INFO L428 AbstractCegarLoop]: === Iteration 20 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:33,965 INFO L82 PathProgramCache]: Analyzing trace with hash 231063758, now seen corresponding path program 14 times [2021-05-03 15:10:33,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:33,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775179303] [2021-05-03 15:10:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:34,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775179303] [2021-05-03 15:10:34,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793977230] [2021-05-03 15:10:34,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:34,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:34,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:34,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:34,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:34,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:10:34,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:34,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:34,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:34,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:10:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:34,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:34,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 15:10:34,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695996527] [2021-05-03 15:10:34,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:10:34,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:10:34,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:10:34,334 INFO L87 Difference]: Start difference. First operand 1534 states and 6376 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:34,578 INFO L93 Difference]: Finished difference Result 1917 states and 7772 transitions. [2021-05-03 15:10:34,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:10:34,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:34,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:34,583 INFO L225 Difference]: With dead ends: 1917 [2021-05-03 15:10:34,583 INFO L226 Difference]: Without dead ends: 1895 [2021-05-03 15:10:34,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:10:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-05-03 15:10:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1494. [2021-05-03 15:10:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 4.163429336905559) internal successors, (6216), 1493 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 6216 transitions. [2021-05-03 15:10:34,624 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 6216 transitions. Word has length 29 [2021-05-03 15:10:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:34,624 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 6216 transitions. [2021-05-03 15:10:34,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 6216 transitions. [2021-05-03 15:10:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:34,629 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:34,629 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:34,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:34,851 INFO L428 AbstractCegarLoop]: === Iteration 21 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:34,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1021452718, now seen corresponding path program 15 times [2021-05-03 15:10:34,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:34,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478174293] [2021-05-03 15:10:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:35,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478174293] [2021-05-03 15:10:35,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103799390] [2021-05-03 15:10:35,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:35,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:10:35,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:35,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:35,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:35,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:35,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:10:35,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:35,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:35,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:35,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:10:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:35,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:35,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 15:10:35,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034099870] [2021-05-03 15:10:35,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:35,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:35,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:35,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:35,303 INFO L87 Difference]: Start difference. First operand 1494 states and 6216 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:35,613 INFO L93 Difference]: Finished difference Result 1767 states and 7271 transitions. [2021-05-03 15:10:35,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:10:35,614 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:35,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:35,618 INFO L225 Difference]: With dead ends: 1767 [2021-05-03 15:10:35,618 INFO L226 Difference]: Without dead ends: 1748 [2021-05-03 15:10:35,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:10:35,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2021-05-03 15:10:35,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1494. [2021-05-03 15:10:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 4.163429336905559) internal successors, (6216), 1493 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 6216 transitions. [2021-05-03 15:10:35,654 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 6216 transitions. Word has length 29 [2021-05-03 15:10:35,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:35,654 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 6216 transitions. [2021-05-03 15:10:35,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:35,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 6216 transitions. [2021-05-03 15:10:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:35,657 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:35,657 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:35,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-03 15:10:35,860 INFO L428 AbstractCegarLoop]: === Iteration 22 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:35,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:35,860 INFO L82 PathProgramCache]: Analyzing trace with hash 307593142, now seen corresponding path program 16 times [2021-05-03 15:10:35,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:35,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033048921] [2021-05-03 15:10:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:35,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033048921] [2021-05-03 15:10:35,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234527038] [2021-05-03 15:10:35,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:36,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:10:36,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:36,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:36,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:36,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 15:10:36,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:36,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:36,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:36,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-05-03 15:10:36,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:36,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:36,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-05-03 15:10:36,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985960763] [2021-05-03 15:10:36,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:36,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:36,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:36,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:36,182 INFO L87 Difference]: Start difference. First operand 1494 states and 6216 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:36,923 INFO L93 Difference]: Finished difference Result 2165 states and 8738 transitions. [2021-05-03 15:10:36,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:10:36,923 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:36,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:36,928 INFO L225 Difference]: With dead ends: 2165 [2021-05-03 15:10:36,929 INFO L226 Difference]: Without dead ends: 2143 [2021-05-03 15:10:36,929 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:10:36,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-05-03 15:10:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1483. [2021-05-03 15:10:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 4.163967611336032) internal successors, (6171), 1482 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 6171 transitions. [2021-05-03 15:10:36,995 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 6171 transitions. Word has length 29 [2021-05-03 15:10:36,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:36,995 INFO L480 AbstractCegarLoop]: Abstraction has 1483 states and 6171 transitions. [2021-05-03 15:10:36,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 6171 transitions. [2021-05-03 15:10:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:36,999 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:36,999 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:37,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-03 15:10:37,208 INFO L428 AbstractCegarLoop]: === Iteration 23 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:37,209 INFO L82 PathProgramCache]: Analyzing trace with hash 312359488, now seen corresponding path program 1 times [2021-05-03 15:10:37,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:37,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234897090] [2021-05-03 15:10:37,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:37,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234897090] [2021-05-03 15:10:37,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513714552] [2021-05-03 15:10:37,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:37,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:37,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:37,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:10:37,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-05-03 15:10:37,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:37,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:37,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:37,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-05-03 15:10:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:37,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:37,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 15:10:37,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078193098] [2021-05-03 15:10:37,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:10:37,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:10:37,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:10:37,499 INFO L87 Difference]: Start difference. First operand 1483 states and 6171 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:37,686 INFO L93 Difference]: Finished difference Result 2054 states and 8414 transitions. [2021-05-03 15:10:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:10:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:37,691 INFO L225 Difference]: With dead ends: 2054 [2021-05-03 15:10:37,692 INFO L226 Difference]: Without dead ends: 2035 [2021-05-03 15:10:37,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:10:37,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-05-03 15:10:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1597. [2021-05-03 15:10:37,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1596 states have (on average 4.1760651629072685) internal successors, (6665), 1596 states have internal predecessors, (6665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:37,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 6665 transitions. [2021-05-03 15:10:37,727 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 6665 transitions. Word has length 29 [2021-05-03 15:10:37,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:37,727 INFO L480 AbstractCegarLoop]: Abstraction has 1597 states and 6665 transitions. [2021-05-03 15:10:37,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 6665 transitions. [2021-05-03 15:10:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:37,732 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:37,732 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:37,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 15:10:37,938 INFO L428 AbstractCegarLoop]: === Iteration 24 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:37,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:37,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1734714314, now seen corresponding path program 2 times [2021-05-03 15:10:37,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:37,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092386114] [2021-05-03 15:10:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:38,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092386114] [2021-05-03 15:10:38,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110427499] [2021-05-03 15:10:38,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:38,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:38,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:38,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:38,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:38,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:10:38,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:38,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:38,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:38,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:10:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:38,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:38,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:10:38,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444988510] [2021-05-03 15:10:38,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:10:38,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:38,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:10:38,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:10:38,279 INFO L87 Difference]: Start difference. First operand 1597 states and 6665 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:38,806 INFO L93 Difference]: Finished difference Result 2354 states and 9594 transitions. [2021-05-03 15:10:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:10:38,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:38,812 INFO L225 Difference]: With dead ends: 2354 [2021-05-03 15:10:38,812 INFO L226 Difference]: Without dead ends: 2323 [2021-05-03 15:10:38,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 465.6ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:10:38,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-05-03 15:10:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1542. [2021-05-03 15:10:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 4.18754055807917) internal successors, (6453), 1541 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 6453 transitions. [2021-05-03 15:10:38,845 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 6453 transitions. Word has length 29 [2021-05-03 15:10:38,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:38,845 INFO L480 AbstractCegarLoop]: Abstraction has 1542 states and 6453 transitions. [2021-05-03 15:10:38,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 6453 transitions. [2021-05-03 15:10:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:38,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:38,850 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:39,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 15:10:39,074 INFO L428 AbstractCegarLoop]: === Iteration 25 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1773592538, now seen corresponding path program 3 times [2021-05-03 15:10:39,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:39,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471790651] [2021-05-03 15:10:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:39,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471790651] [2021-05-03 15:10:39,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42061897] [2021-05-03 15:10:39,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:39,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:10:39,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:39,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:39,290 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:39,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:10:39,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:39,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:39,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:39,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:10:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:39,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:39,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:10:39,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19521001] [2021-05-03 15:10:39,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:10:39,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:39,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:10:39,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:10:39,448 INFO L87 Difference]: Start difference. First operand 1542 states and 6453 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:40,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:40,105 INFO L93 Difference]: Finished difference Result 1944 states and 8024 transitions. [2021-05-03 15:10:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:10:40,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:40,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:40,110 INFO L225 Difference]: With dead ends: 1944 [2021-05-03 15:10:40,110 INFO L226 Difference]: Without dead ends: 1929 [2021-05-03 15:10:40,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:10:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-05-03 15:10:40,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1527. [2021-05-03 15:10:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 4.192005242463958) internal successors, (6397), 1526 states have internal predecessors, (6397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 6397 transitions. [2021-05-03 15:10:40,132 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 6397 transitions. Word has length 29 [2021-05-03 15:10:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:40,133 INFO L480 AbstractCegarLoop]: Abstraction has 1527 states and 6397 transitions. [2021-05-03 15:10:40,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 6397 transitions. [2021-05-03 15:10:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:40,136 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:40,136 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:40,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-03 15:10:40,344 INFO L428 AbstractCegarLoop]: === Iteration 26 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash 409541884, now seen corresponding path program 4 times [2021-05-03 15:10:40,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:40,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63021245] [2021-05-03 15:10:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:40,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63021245] [2021-05-03 15:10:40,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990362672] [2021-05-03 15:10:40,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:40,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:10:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:40,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:40,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:10:40,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-05-03 15:10:40,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:40,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:40,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:40,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-05-03 15:10:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:40,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:40,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 15:10:40,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000233779] [2021-05-03 15:10:40,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:10:40,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:40,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:10:40,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:10:40,619 INFO L87 Difference]: Start difference. First operand 1527 states and 6397 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:40,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:40,764 INFO L93 Difference]: Finished difference Result 2139 states and 8697 transitions. [2021-05-03 15:10:40,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:10:40,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:40,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:40,770 INFO L225 Difference]: With dead ends: 2139 [2021-05-03 15:10:40,770 INFO L226 Difference]: Without dead ends: 2120 [2021-05-03 15:10:40,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:10:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2021-05-03 15:10:40,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 1623. [2021-05-03 15:10:40,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 4.199136868064119) internal successors, (6811), 1622 states have internal predecessors, (6811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 6811 transitions. [2021-05-03 15:10:40,800 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 6811 transitions. Word has length 29 [2021-05-03 15:10:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:40,800 INFO L480 AbstractCegarLoop]: Abstraction has 1623 states and 6811 transitions. [2021-05-03 15:10:40,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 6811 transitions. [2021-05-03 15:10:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:40,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:40,803 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:41,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:41,005 INFO L428 AbstractCegarLoop]: === Iteration 27 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:41,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:41,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1831896710, now seen corresponding path program 5 times [2021-05-03 15:10:41,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:41,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501777151] [2021-05-03 15:10:41,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:41,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:41,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501777151] [2021-05-03 15:10:41,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177751925] [2021-05-03 15:10:41,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:41,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:10:41,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:41,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:10:41,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:41,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 15:10:41,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:41,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:41,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:41,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-05-03 15:10:41,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:41,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:41,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 15:10:41,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729418535] [2021-05-03 15:10:41,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:10:41,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:41,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:10:41,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:10:41,559 INFO L87 Difference]: Start difference. First operand 1623 states and 6811 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:41,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:41,888 INFO L93 Difference]: Finished difference Result 2097 states and 8589 transitions. [2021-05-03 15:10:41,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:10:41,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:41,895 INFO L225 Difference]: With dead ends: 2097 [2021-05-03 15:10:41,896 INFO L226 Difference]: Without dead ends: 2066 [2021-05-03 15:10:41,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:10:41,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-05-03 15:10:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1551. [2021-05-03 15:10:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1550 states have (on average 4.192903225806452) internal successors, (6499), 1550 states have internal predecessors, (6499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 6499 transitions. [2021-05-03 15:10:41,939 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 6499 transitions. Word has length 29 [2021-05-03 15:10:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:41,940 INFO L480 AbstractCegarLoop]: Abstraction has 1551 states and 6499 transitions. [2021-05-03 15:10:41,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 6499 transitions. [2021-05-03 15:10:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:41,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:41,944 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:42,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-03 15:10:42,157 INFO L428 AbstractCegarLoop]: === Iteration 28 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:42,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:42,157 INFO L82 PathProgramCache]: Analyzing trace with hash -768158788, now seen corresponding path program 6 times [2021-05-03 15:10:42,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:42,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967477996] [2021-05-03 15:10:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:42,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967477996] [2021-05-03 15:10:42,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907850027] [2021-05-03 15:10:42,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:42,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:10:42,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:42,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:42,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:42,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:42,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:10:42,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:42,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:42,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:42,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:10:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:42,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:42,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 15:10:42,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436339737] [2021-05-03 15:10:42,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:42,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:42,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:42,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:42,472 INFO L87 Difference]: Start difference. First operand 1551 states and 6499 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:43,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:43,186 INFO L93 Difference]: Finished difference Result 2018 states and 8314 transitions. [2021-05-03 15:10:43,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:10:43,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:43,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:43,192 INFO L225 Difference]: With dead ends: 2018 [2021-05-03 15:10:43,192 INFO L226 Difference]: Without dead ends: 1999 [2021-05-03 15:10:43,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:10:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1999 states. [2021-05-03 15:10:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1999 to 1539. [2021-05-03 15:10:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 4.198309492847854) internal successors, (6457), 1538 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 6457 transitions. [2021-05-03 15:10:43,219 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 6457 transitions. Word has length 29 [2021-05-03 15:10:43,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:43,220 INFO L480 AbstractCegarLoop]: Abstraction has 1539 states and 6457 transitions. [2021-05-03 15:10:43,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 6457 transitions. [2021-05-03 15:10:43,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:43,223 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:43,223 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:43,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:43,423 INFO L428 AbstractCegarLoop]: === Iteration 29 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:43,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:43,424 INFO L82 PathProgramCache]: Analyzing trace with hash 783680366, now seen corresponding path program 7 times [2021-05-03 15:10:43,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:43,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851251441] [2021-05-03 15:10:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:43,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851251441] [2021-05-03 15:10:43,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974550549] [2021-05-03 15:10:43,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:43,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:10:43,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-05-03 15:10:43,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:43,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:43,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:43,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-05-03 15:10:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:43,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:43,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 15:10:43,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752621862] [2021-05-03 15:10:43,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:10:43,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:43,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:10:43,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:10:43,723 INFO L87 Difference]: Start difference. First operand 1539 states and 6457 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:43,982 INFO L93 Difference]: Finished difference Result 2247 states and 9150 transitions. [2021-05-03 15:10:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:10:43,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:43,988 INFO L225 Difference]: With dead ends: 2247 [2021-05-03 15:10:43,988 INFO L226 Difference]: Without dead ends: 2228 [2021-05-03 15:10:43,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:10:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-05-03 15:10:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1643. [2021-05-03 15:10:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 4.2003654080389765) internal successors, (6897), 1642 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 6897 transitions. [2021-05-03 15:10:44,014 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 6897 transitions. Word has length 29 [2021-05-03 15:10:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:44,015 INFO L480 AbstractCegarLoop]: Abstraction has 1643 states and 6897 transitions. [2021-05-03 15:10:44,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 6897 transitions. [2021-05-03 15:10:44,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:44,018 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:44,018 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:44,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-03 15:10:44,218 INFO L428 AbstractCegarLoop]: === Iteration 30 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:44,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:44,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2088932104, now seen corresponding path program 8 times [2021-05-03 15:10:44,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:44,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334651395] [2021-05-03 15:10:44,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334651395] [2021-05-03 15:10:44,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337773645] [2021-05-03 15:10:44,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:44,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:44,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:44,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:44,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:44,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:44,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:10:44,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:44,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:44,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:44,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:10:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:44,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:44,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:10:44,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032542256] [2021-05-03 15:10:44,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:10:44,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:44,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:10:44,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:10:44,547 INFO L87 Difference]: Start difference. First operand 1643 states and 6897 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:45,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:45,123 INFO L93 Difference]: Finished difference Result 2599 states and 10573 transitions. [2021-05-03 15:10:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:10:45,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:45,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:45,129 INFO L225 Difference]: With dead ends: 2599 [2021-05-03 15:10:45,130 INFO L226 Difference]: Without dead ends: 2568 [2021-05-03 15:10:45,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 466.6ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:10:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2021-05-03 15:10:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1571. [2021-05-03 15:10:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 4.194267515923567) internal successors, (6585), 1570 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:45,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 6585 transitions. [2021-05-03 15:10:45,162 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 6585 transitions. Word has length 29 [2021-05-03 15:10:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:45,162 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 6585 transitions. [2021-05-03 15:10:45,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:45,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 6585 transitions. [2021-05-03 15:10:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:45,166 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:45,166 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:45,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:45,366 INFO L428 AbstractCegarLoop]: === Iteration 31 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash -394020306, now seen corresponding path program 9 times [2021-05-03 15:10:45,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:45,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832945609] [2021-05-03 15:10:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:45,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832945609] [2021-05-03 15:10:45,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645264027] [2021-05-03 15:10:45,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:45,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:10:45,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:45,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:45,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:10:45,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:45,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:45,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:45,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:10:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:45,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:45,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 15:10:45,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182515313] [2021-05-03 15:10:45,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:45,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:45,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:45,698 INFO L87 Difference]: Start difference. First operand 1571 states and 6585 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:46,559 INFO L93 Difference]: Finished difference Result 2243 states and 9179 transitions. [2021-05-03 15:10:46,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:10:46,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:46,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:46,564 INFO L225 Difference]: With dead ends: 2243 [2021-05-03 15:10:46,564 INFO L226 Difference]: Without dead ends: 2224 [2021-05-03 15:10:46,565 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 742.9ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:10:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-05-03 15:10:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1547. [2021-05-03 15:10:46,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 4.19340232858991) internal successors, (6483), 1546 states have internal predecessors, (6483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 6483 transitions. [2021-05-03 15:10:46,599 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 6483 transitions. Word has length 29 [2021-05-03 15:10:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:46,600 INFO L480 AbstractCegarLoop]: Abstraction has 1547 states and 6483 transitions. [2021-05-03 15:10:46,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 6483 transitions. [2021-05-03 15:10:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:46,603 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:46,604 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:46,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-03 15:10:46,824 INFO L428 AbstractCegarLoop]: === Iteration 32 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:46,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1761581676, now seen corresponding path program 10 times [2021-05-03 15:10:46,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:46,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931515924] [2021-05-03 15:10:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:46,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931515924] [2021-05-03 15:10:46,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826483064] [2021-05-03 15:10:46,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:47,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:10:47,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:47,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:47,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 15:10:47,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:47,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:47,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:47,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-05-03 15:10:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:47,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:47,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-03 15:10:47,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814758137] [2021-05-03 15:10:47,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:10:47,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:47,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:10:47,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:10:47,154 INFO L87 Difference]: Start difference. First operand 1547 states and 6483 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:47,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:47,402 INFO L93 Difference]: Finished difference Result 1676 states and 6898 transitions. [2021-05-03 15:10:47,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:10:47,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:47,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:47,408 INFO L225 Difference]: With dead ends: 1676 [2021-05-03 15:10:47,408 INFO L226 Difference]: Without dead ends: 1657 [2021-05-03 15:10:47,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:10:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-05-03 15:10:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1550. [2021-05-03 15:10:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 4.188508715300194) internal successors, (6488), 1549 states have internal predecessors, (6488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 6488 transitions. [2021-05-03 15:10:47,446 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 6488 transitions. Word has length 29 [2021-05-03 15:10:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:47,446 INFO L480 AbstractCegarLoop]: Abstraction has 1550 states and 6488 transitions. [2021-05-03 15:10:47,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 6488 transitions. [2021-05-03 15:10:47,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:47,451 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:47,451 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:47,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:47,673 INFO L428 AbstractCegarLoop]: === Iteration 33 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1063587426, now seen corresponding path program 17 times [2021-05-03 15:10:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:47,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903917610] [2021-05-03 15:10:47,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:47,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903917610] [2021-05-03 15:10:47,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092904323] [2021-05-03 15:10:47,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:47,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:47,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:47,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:10:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:47,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-05-03 15:10:47,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:47,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:47,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:47,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-05-03 15:10:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:47,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:47,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-05-03 15:10:47,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254506299] [2021-05-03 15:10:47,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:10:47,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:47,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:10:47,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:10:47,986 INFO L87 Difference]: Start difference. First operand 1550 states and 6488 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:48,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:48,530 INFO L93 Difference]: Finished difference Result 1853 states and 7651 transitions. [2021-05-03 15:10:48,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:10:48,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:48,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:48,534 INFO L225 Difference]: With dead ends: 1853 [2021-05-03 15:10:48,535 INFO L226 Difference]: Without dead ends: 1838 [2021-05-03 15:10:48,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 457.3ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:10:48,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2021-05-03 15:10:48,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1640. [2021-05-03 15:10:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 4.204392922513728) internal successors, (6891), 1639 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 6891 transitions. [2021-05-03 15:10:48,569 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 6891 transitions. Word has length 29 [2021-05-03 15:10:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:48,570 INFO L480 AbstractCegarLoop]: Abstraction has 1640 states and 6891 transitions. [2021-05-03 15:10:48,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:48,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 6891 transitions. [2021-05-03 15:10:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:48,574 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:48,574 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:48,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-03 15:10:48,793 INFO L428 AbstractCegarLoop]: === Iteration 34 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:48,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:48,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1416726916, now seen corresponding path program 18 times [2021-05-03 15:10:48,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:48,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497128715] [2021-05-03 15:10:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:48,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497128715] [2021-05-03 15:10:48,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747118140] [2021-05-03 15:10:48,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:48,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:10:48,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:48,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:48,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:49,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:49,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:10:49,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:49,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:49,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:49,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-05-03 15:10:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:49,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:49,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:10:49,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991872662] [2021-05-03 15:10:49,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:10:49,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:49,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:10:49,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:10:49,197 INFO L87 Difference]: Start difference. First operand 1640 states and 6891 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:50,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:50,082 INFO L93 Difference]: Finished difference Result 2273 states and 9183 transitions. [2021-05-03 15:10:50,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:10:50,083 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:50,089 INFO L225 Difference]: With dead ends: 2273 [2021-05-03 15:10:50,089 INFO L226 Difference]: Without dead ends: 2243 [2021-05-03 15:10:50,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:10:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2021-05-03 15:10:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 1689. [2021-05-03 15:10:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1688 states have (on average 4.223341232227488) internal successors, (7129), 1688 states have internal predecessors, (7129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 7129 transitions. [2021-05-03 15:10:50,120 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 7129 transitions. Word has length 29 [2021-05-03 15:10:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:50,120 INFO L480 AbstractCegarLoop]: Abstraction has 1689 states and 7129 transitions. [2021-05-03 15:10:50,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 7129 transitions. [2021-05-03 15:10:50,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:50,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:50,123 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:50,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:50,324 INFO L428 AbstractCegarLoop]: === Iteration 35 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1605568482, now seen corresponding path program 19 times [2021-05-03 15:10:50,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:50,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236743432] [2021-05-03 15:10:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:50,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236743432] [2021-05-03 15:10:50,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089945063] [2021-05-03 15:10:50,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:50,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:10:50,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:50,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 15:10:50,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:50,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:50,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:50,578 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-05-03 15:10:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:50,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:50,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:10:50,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310766877] [2021-05-03 15:10:50,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:10:50,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:50,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:10:50,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:10:50,692 INFO L87 Difference]: Start difference. First operand 1689 states and 7129 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:51,264 INFO L93 Difference]: Finished difference Result 2341 states and 9426 transitions. [2021-05-03 15:10:51,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:10:51,264 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:51,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:51,269 INFO L225 Difference]: With dead ends: 2341 [2021-05-03 15:10:51,269 INFO L226 Difference]: Without dead ends: 2301 [2021-05-03 15:10:51,269 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 483.7ms TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:10:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-05-03 15:10:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1703. [2021-05-03 15:10:51,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 4.208578143360752) internal successors, (7163), 1702 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 7163 transitions. [2021-05-03 15:10:51,310 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 7163 transitions. Word has length 29 [2021-05-03 15:10:51,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:51,310 INFO L480 AbstractCegarLoop]: Abstraction has 1703 states and 7163 transitions. [2021-05-03 15:10:51,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:51,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 7163 transitions. [2021-05-03 15:10:51,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:51,313 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:51,313 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:51,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-03 15:10:51,514 INFO L428 AbstractCegarLoop]: === Iteration 36 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:51,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1021005372, now seen corresponding path program 20 times [2021-05-03 15:10:51,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:51,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019688004] [2021-05-03 15:10:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:51,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019688004] [2021-05-03 15:10:51,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742037413] [2021-05-03 15:10:51,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:51,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:51,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:51,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:51,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:51,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:10:51,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:51,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:51,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:51,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-05-03 15:10:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:51,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:51,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:10:51,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638514382] [2021-05-03 15:10:51,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:10:51,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:51,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:10:51,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:10:51,934 INFO L87 Difference]: Start difference. First operand 1703 states and 7163 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:52,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:52,670 INFO L93 Difference]: Finished difference Result 2257 states and 9200 transitions. [2021-05-03 15:10:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:10:52,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:52,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:52,676 INFO L225 Difference]: With dead ends: 2257 [2021-05-03 15:10:52,676 INFO L226 Difference]: Without dead ends: 2201 [2021-05-03 15:10:52,676 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=205, Invalid=1127, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:10:52,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-05-03 15:10:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1653. [2021-05-03 15:10:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 4.221549636803874) internal successors, (6974), 1652 states have internal predecessors, (6974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 6974 transitions. [2021-05-03 15:10:52,705 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 6974 transitions. Word has length 29 [2021-05-03 15:10:52,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:52,705 INFO L480 AbstractCegarLoop]: Abstraction has 1653 states and 6974 transitions. [2021-05-03 15:10:52,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:52,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 6974 transitions. [2021-05-03 15:10:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:52,708 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:52,708 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:52,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 15:10:52,909 INFO L428 AbstractCegarLoop]: === Iteration 37 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:52,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:52,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1011868340, now seen corresponding path program 21 times [2021-05-03 15:10:52,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:52,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345734080] [2021-05-03 15:10:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:53,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:53,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345734080] [2021-05-03 15:10:53,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480675517] [2021-05-03 15:10:53,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:53,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:10:53,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:53,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:10:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:53,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:53,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-05-03 15:10:53,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:53,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:53,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:53,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:16 [2021-05-03 15:10:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:53,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:53,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 15:10:53,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383316378] [2021-05-03 15:10:53,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:53,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:53,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:53,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:53,290 INFO L87 Difference]: Start difference. First operand 1653 states and 6974 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:53,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:53,965 INFO L93 Difference]: Finished difference Result 2037 states and 8441 transitions. [2021-05-03 15:10:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:10:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:53,970 INFO L225 Difference]: With dead ends: 2037 [2021-05-03 15:10:53,970 INFO L226 Difference]: Without dead ends: 2022 [2021-05-03 15:10:53,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 570.3ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-05-03 15:10:53,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-05-03 15:10:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1665. [2021-05-03 15:10:53,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1664 states have (on average 4.210336538461538) internal successors, (7006), 1664 states have internal predecessors, (7006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:53,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 7006 transitions. [2021-05-03 15:10:53,998 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 7006 transitions. Word has length 29 [2021-05-03 15:10:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:53,998 INFO L480 AbstractCegarLoop]: Abstraction has 1665 states and 7006 transitions. [2021-05-03 15:10:53,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 7006 transitions. [2021-05-03 15:10:54,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:54,001 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:54,001 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:54,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-03 15:10:54,201 INFO L428 AbstractCegarLoop]: === Iteration 38 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:54,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:54,202 INFO L82 PathProgramCache]: Analyzing trace with hash 885700194, now seen corresponding path program 22 times [2021-05-03 15:10:54,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:54,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457717843] [2021-05-03 15:10:54,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:54,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457717843] [2021-05-03 15:10:54,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35624045] [2021-05-03 15:10:54,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:54,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:10:54,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:54,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:10:54,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:54,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:10:54,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:54,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:54,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:54,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-05-03 15:10:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:54,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:54,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:10:54,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413266362] [2021-05-03 15:10:54,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:10:54,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:54,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:10:54,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:10:54,628 INFO L87 Difference]: Start difference. First operand 1665 states and 7006 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:55,737 INFO L93 Difference]: Finished difference Result 2174 states and 9022 transitions. [2021-05-03 15:10:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:10:55,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:55,745 INFO L225 Difference]: With dead ends: 2174 [2021-05-03 15:10:55,745 INFO L226 Difference]: Without dead ends: 2145 [2021-05-03 15:10:55,746 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 862.5ms TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:10:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-05-03 15:10:55,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1698. [2021-05-03 15:10:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 4.215674720094284) internal successors, (7154), 1697 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:55,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 7154 transitions. [2021-05-03 15:10:55,785 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 7154 transitions. Word has length 29 [2021-05-03 15:10:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:55,785 INFO L480 AbstractCegarLoop]: Abstraction has 1698 states and 7154 transitions. [2021-05-03 15:10:55,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 7154 transitions. [2021-05-03 15:10:55,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:55,788 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:55,788 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:55,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 15:10:55,990 INFO L428 AbstractCegarLoop]: === Iteration 39 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:55,990 INFO L82 PathProgramCache]: Analyzing trace with hash 532560704, now seen corresponding path program 23 times [2021-05-03 15:10:55,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:55,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428643139] [2021-05-03 15:10:55,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:56,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428643139] [2021-05-03 15:10:56,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506878361] [2021-05-03 15:10:56,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:56,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:10:56,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:56,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:56,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 15:10:56,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:56,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:56,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:56,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-05-03 15:10:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:56,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:56,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-05-03 15:10:56,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799332742] [2021-05-03 15:10:56,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:10:56,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:10:56,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:10:56,321 INFO L87 Difference]: Start difference. First operand 1698 states and 7154 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:56,932 INFO L93 Difference]: Finished difference Result 2176 states and 9012 transitions. [2021-05-03 15:10:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:10:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:56,937 INFO L225 Difference]: With dead ends: 2176 [2021-05-03 15:10:56,937 INFO L226 Difference]: Without dead ends: 2161 [2021-05-03 15:10:56,937 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:10:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-05-03 15:10:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1754. [2021-05-03 15:10:56,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 4.22875071306332) internal successors, (7413), 1753 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:56,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 7413 transitions. [2021-05-03 15:10:56,968 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 7413 transitions. Word has length 29 [2021-05-03 15:10:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:56,968 INFO L480 AbstractCegarLoop]: Abstraction has 1754 states and 7413 transitions. [2021-05-03 15:10:56,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 7413 transitions. [2021-05-03 15:10:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:56,971 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:56,971 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:57,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:57,172 INFO L428 AbstractCegarLoop]: === Iteration 40 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:57,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1324674304, now seen corresponding path program 24 times [2021-05-03 15:10:57,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:57,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566396741] [2021-05-03 15:10:57,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:57,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566396741] [2021-05-03 15:10:57,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365790630] [2021-05-03 15:10:57,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:57,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:10:57,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:10:57,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:10:57,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:57,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:57,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:10:57,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:10:57,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:57,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:57,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:10:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:57,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:57,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:10:57,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543308776] [2021-05-03 15:10:57,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:10:57,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:57,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:10:57,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:10:57,579 INFO L87 Difference]: Start difference. First operand 1754 states and 7413 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:58,289 INFO L93 Difference]: Finished difference Result 2064 states and 8592 transitions. [2021-05-03 15:10:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:10:58,289 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:58,295 INFO L225 Difference]: With dead ends: 2064 [2021-05-03 15:10:58,295 INFO L226 Difference]: Without dead ends: 2050 [2021-05-03 15:10:58,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:10:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2021-05-03 15:10:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1754. [2021-05-03 15:10:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 4.22875071306332) internal successors, (7413), 1753 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 7413 transitions. [2021-05-03 15:10:58,326 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 7413 transitions. Word has length 29 [2021-05-03 15:10:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:58,326 INFO L480 AbstractCegarLoop]: Abstraction has 1754 states and 7413 transitions. [2021-05-03 15:10:58,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 7413 transitions. [2021-05-03 15:10:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:58,330 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:58,330 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:10:58,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-03 15:10:58,530 INFO L428 AbstractCegarLoop]: === Iteration 41 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:10:58,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:10:58,531 INFO L82 PathProgramCache]: Analyzing trace with hash 787754326, now seen corresponding path program 25 times [2021-05-03 15:10:58,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:10:58,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56608756] [2021-05-03 15:10:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:10:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:58,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56608756] [2021-05-03 15:10:58,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256382348] [2021-05-03 15:10:58,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:10:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:10:58,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:10:58,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:10:58,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:10:58,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:10:58,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:10:58,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:10:58,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-05-03 15:10:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:10:58,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:10:58,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:10:58,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236265207] [2021-05-03 15:10:58,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:10:58,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:10:58,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:10:58,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:10:58,967 INFO L87 Difference]: Start difference. First operand 1754 states and 7413 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:10:59,784 INFO L93 Difference]: Finished difference Result 2468 states and 10008 transitions. [2021-05-03 15:10:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:10:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:10:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:10:59,790 INFO L225 Difference]: With dead ends: 2468 [2021-05-03 15:10:59,790 INFO L226 Difference]: Without dead ends: 2395 [2021-05-03 15:10:59,791 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 663.7ms TimeCoverageRelationStatistics Valid=225, Invalid=831, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:10:59,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-05-03 15:10:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1808. [2021-05-03 15:10:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 4.254565578306585) internal successors, (7688), 1807 states have internal predecessors, (7688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:59,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 7688 transitions. [2021-05-03 15:10:59,828 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 7688 transitions. Word has length 29 [2021-05-03 15:10:59,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:10:59,828 INFO L480 AbstractCegarLoop]: Abstraction has 1808 states and 7688 transitions. [2021-05-03 15:10:59,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:10:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 7688 transitions. [2021-05-03 15:10:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:10:59,833 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:10:59,833 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:00,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-03 15:11:00,035 INFO L428 AbstractCegarLoop]: === Iteration 42 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:00,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:00,035 INFO L82 PathProgramCache]: Analyzing trace with hash -680907206, now seen corresponding path program 26 times [2021-05-03 15:11:00,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:00,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524194486] [2021-05-03 15:11:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:00,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524194486] [2021-05-03 15:11:00,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895772279] [2021-05-03 15:11:00,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:00,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:00,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:00,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:00,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:00,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:00,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:00,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:00,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:00,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:00,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:11:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:00,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:00,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:00,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631120906] [2021-05-03 15:11:00,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:00,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:00,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:00,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:00,398 INFO L87 Difference]: Start difference. First operand 1808 states and 7688 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:01,343 INFO L93 Difference]: Finished difference Result 2311 states and 9627 transitions. [2021-05-03 15:11:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:11:01,343 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:01,348 INFO L225 Difference]: With dead ends: 2311 [2021-05-03 15:11:01,348 INFO L226 Difference]: Without dead ends: 2296 [2021-05-03 15:11:01,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 840.9ms TimeCoverageRelationStatistics Valid=273, Invalid=1133, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:11:01,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-05-03 15:11:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1878. [2021-05-03 15:11:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1877 states have (on average 4.275972296217368) internal successors, (8026), 1877 states have internal predecessors, (8026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 8026 transitions. [2021-05-03 15:11:01,378 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 8026 transitions. Word has length 29 [2021-05-03 15:11:01,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:01,378 INFO L480 AbstractCegarLoop]: Abstraction has 1878 states and 8026 transitions. [2021-05-03 15:11:01,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 8026 transitions. [2021-05-03 15:11:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:01,381 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:01,381 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:01,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:01,582 INFO L428 AbstractCegarLoop]: === Iteration 43 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:01,582 INFO L82 PathProgramCache]: Analyzing trace with hash -869748772, now seen corresponding path program 27 times [2021-05-03 15:11:01,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:01,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070426420] [2021-05-03 15:11:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:01,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070426420] [2021-05-03 15:11:01,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665923195] [2021-05-03 15:11:01,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:01,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:11:01,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:01,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:01,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:01,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:01,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:01,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:01,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:01,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:11:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:01,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:01,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:01,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540417160] [2021-05-03 15:11:01,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:01,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:01,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:01,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:01,999 INFO L87 Difference]: Start difference. First operand 1878 states and 8026 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:02,749 INFO L93 Difference]: Finished difference Result 2301 states and 9557 transitions. [2021-05-03 15:11:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:11:02,750 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:02,756 INFO L225 Difference]: With dead ends: 2301 [2021-05-03 15:11:02,756 INFO L226 Difference]: Without dead ends: 2292 [2021-05-03 15:11:02,756 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 723.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:11:02,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-05-03 15:11:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 1885. [2021-05-03 15:11:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 4.271231422505308) internal successors, (8047), 1884 states have internal predecessors, (8047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 8047 transitions. [2021-05-03 15:11:02,788 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 8047 transitions. Word has length 29 [2021-05-03 15:11:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:02,789 INFO L480 AbstractCegarLoop]: Abstraction has 1885 states and 8047 transitions. [2021-05-03 15:11:02,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 8047 transitions. [2021-05-03 15:11:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:02,793 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:02,793 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:02,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-03 15:11:02,996 INFO L428 AbstractCegarLoop]: === Iteration 44 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:02,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1756825082, now seen corresponding path program 28 times [2021-05-03 15:11:02,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:02,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773679949] [2021-05-03 15:11:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:03,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773679949] [2021-05-03 15:11:03,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124075087] [2021-05-03 15:11:03,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:03,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:03,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:03,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:11:03,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:03,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:03,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:03,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:03,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:03,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-05-03 15:11:03,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:03,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:03,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:03,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920196620] [2021-05-03 15:11:03,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:03,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:03,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:03,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:03,381 INFO L87 Difference]: Start difference. First operand 1885 states and 8047 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:04,141 INFO L93 Difference]: Finished difference Result 2692 states and 10883 transitions. [2021-05-03 15:11:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:11:04,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:04,148 INFO L225 Difference]: With dead ends: 2692 [2021-05-03 15:11:04,148 INFO L226 Difference]: Without dead ends: 2626 [2021-05-03 15:11:04,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 612.3ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:11:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-05-03 15:11:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1892. [2021-05-03 15:11:04,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 4.260708619777895) internal successors, (8057), 1891 states have internal predecessors, (8057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 8057 transitions. [2021-05-03 15:11:04,199 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 8057 transitions. Word has length 29 [2021-05-03 15:11:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:04,200 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 8057 transitions. [2021-05-03 15:11:04,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 8057 transitions. [2021-05-03 15:11:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:04,204 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:04,204 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:04,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:04,410 INFO L428 AbstractCegarLoop]: === Iteration 45 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:04,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2127923978, now seen corresponding path program 29 times [2021-05-03 15:11:04,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:04,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153337155] [2021-05-03 15:11:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:04,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153337155] [2021-05-03 15:11:04,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418318183] [2021-05-03 15:11:04,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:04,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:04,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:04,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:04,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:04,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-05-03 15:11:04,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:04,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:04,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:04,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-05-03 15:11:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:04,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:04,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-05-03 15:11:04,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187955655] [2021-05-03 15:11:04,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:11:04,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:04,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:11:04,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:04,718 INFO L87 Difference]: Start difference. First operand 1892 states and 8057 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:05,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:05,266 INFO L93 Difference]: Finished difference Result 2349 states and 9799 transitions. [2021-05-03 15:11:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:11:05,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:05,273 INFO L225 Difference]: With dead ends: 2349 [2021-05-03 15:11:05,273 INFO L226 Difference]: Without dead ends: 2323 [2021-05-03 15:11:05,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:11:05,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-05-03 15:11:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1832. [2021-05-03 15:11:05,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 4.258874931731294) internal successors, (7798), 1831 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 7798 transitions. [2021-05-03 15:11:05,309 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 7798 transitions. Word has length 29 [2021-05-03 15:11:05,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:05,309 INFO L480 AbstractCegarLoop]: Abstraction has 1832 states and 7798 transitions. [2021-05-03 15:11:05,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:05,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 7798 transitions. [2021-05-03 15:11:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:05,314 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:05,314 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:05,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-03 15:11:05,514 INFO L428 AbstractCegarLoop]: === Iteration 46 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:05,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:05,515 INFO L82 PathProgramCache]: Analyzing trace with hash 914526842, now seen corresponding path program 30 times [2021-05-03 15:11:05,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:05,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803516845] [2021-05-03 15:11:05,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:05,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803516845] [2021-05-03 15:11:05,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122487403] [2021-05-03 15:11:05,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:05,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:11:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-03 15:11:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:05,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:05,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:05,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:05,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:05,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:05,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-05-03 15:11:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:05,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:05,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 15:11:05,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850723345] [2021-05-03 15:11:05,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:11:05,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:05,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:11:05,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:05,909 INFO L87 Difference]: Start difference. First operand 1832 states and 7798 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:06,361 INFO L93 Difference]: Finished difference Result 2062 states and 8668 transitions. [2021-05-03 15:11:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:11:06,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:06,366 INFO L225 Difference]: With dead ends: 2062 [2021-05-03 15:11:06,366 INFO L226 Difference]: Without dead ends: 2043 [2021-05-03 15:11:06,367 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 338.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:11:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2043 states. [2021-05-03 15:11:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2043 to 1829. [2021-05-03 15:11:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1828 states have (on average 4.260393873085339) internal successors, (7788), 1828 states have internal predecessors, (7788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 7788 transitions. [2021-05-03 15:11:06,398 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 7788 transitions. Word has length 29 [2021-05-03 15:11:06,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:06,398 INFO L480 AbstractCegarLoop]: Abstraction has 1829 states and 7788 transitions. [2021-05-03 15:11:06,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:06,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 7788 transitions. [2021-05-03 15:11:06,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:06,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:06,401 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:06,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:06,602 INFO L428 AbstractCegarLoop]: === Iteration 47 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:06,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:06,602 INFO L82 PathProgramCache]: Analyzing trace with hash 828150992, now seen corresponding path program 11 times [2021-05-03 15:11:06,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:06,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967723596] [2021-05-03 15:11:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:06,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967723596] [2021-05-03 15:11:06,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726283387] [2021-05-03 15:11:06,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:06,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:06,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:06,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:06,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:06,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:06,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-05-03 15:11:06,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:06,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:06,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:06,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-05-03 15:11:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:07,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:07,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-05-03 15:11:07,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367240353] [2021-05-03 15:11:07,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:07,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:07,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:07,020 INFO L87 Difference]: Start difference. First operand 1829 states and 7788 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:07,279 INFO L93 Difference]: Finished difference Result 2479 states and 10359 transitions. [2021-05-03 15:11:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:07,285 INFO L225 Difference]: With dead ends: 2479 [2021-05-03 15:11:07,286 INFO L226 Difference]: Without dead ends: 2460 [2021-05-03 15:11:07,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 323.8ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-05-03 15:11:07,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2009. [2021-05-03 15:11:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 4.276892430278885) internal successors, (8588), 2008 states have internal predecessors, (8588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 8588 transitions. [2021-05-03 15:11:07,335 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 8588 transitions. Word has length 29 [2021-05-03 15:11:07,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:07,335 INFO L480 AbstractCegarLoop]: Abstraction has 2009 states and 8588 transitions. [2021-05-03 15:11:07,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 8588 transitions. [2021-05-03 15:11:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:07,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:07,340 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:07,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 15:11:07,553 INFO L428 AbstractCegarLoop]: === Iteration 48 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:07,553 INFO L82 PathProgramCache]: Analyzing trace with hash -2044461478, now seen corresponding path program 12 times [2021-05-03 15:11:07,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:07,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65131346] [2021-05-03 15:11:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:07,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65131346] [2021-05-03 15:11:07,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503481704] [2021-05-03 15:11:07,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:07,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:11:07,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:07,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:07,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:07,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:11:07,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:07,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:07,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:07,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:11:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:08,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:08,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 15:11:08,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853421126] [2021-05-03 15:11:08,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:08,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:08,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:08,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:08,013 INFO L87 Difference]: Start difference. First operand 2009 states and 8588 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:08,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:08,654 INFO L93 Difference]: Finished difference Result 2570 states and 10742 transitions. [2021-05-03 15:11:08,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 15:11:08,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:08,661 INFO L225 Difference]: With dead ends: 2570 [2021-05-03 15:11:08,662 INFO L226 Difference]: Without dead ends: 2557 [2021-05-03 15:11:08,662 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=201, Invalid=729, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:11:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2021-05-03 15:11:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2000. [2021-05-03 15:11:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 4.281140570285142) internal successors, (8558), 1999 states have internal predecessors, (8558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 8558 transitions. [2021-05-03 15:11:08,699 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 8558 transitions. Word has length 29 [2021-05-03 15:11:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:08,699 INFO L480 AbstractCegarLoop]: Abstraction has 2000 states and 8558 transitions. [2021-05-03 15:11:08,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 8558 transitions. [2021-05-03 15:11:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:08,704 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:08,704 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:08,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-05-03 15:11:08,913 INFO L428 AbstractCegarLoop]: === Iteration 49 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:08,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1805403798, now seen corresponding path program 13 times [2021-05-03 15:11:08,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:08,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580979967] [2021-05-03 15:11:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:09,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580979967] [2021-05-03 15:11:09,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36723941] [2021-05-03 15:11:09,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:09,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:09,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:09,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:09,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:09,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:09,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:09,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 15:11:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:09,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:09,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-05-03 15:11:09,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171683591] [2021-05-03 15:11:09,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:09,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:09,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:09,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:09,359 INFO L87 Difference]: Start difference. First operand 2000 states and 8558 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:09,659 INFO L93 Difference]: Finished difference Result 2492 states and 10385 transitions. [2021-05-03 15:11:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:09,660 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:09,666 INFO L225 Difference]: With dead ends: 2492 [2021-05-03 15:11:09,666 INFO L226 Difference]: Without dead ends: 2464 [2021-05-03 15:11:09,666 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2021-05-03 15:11:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 1945. [2021-05-03 15:11:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1944 states have (on average 4.270061728395062) internal successors, (8301), 1944 states have internal predecessors, (8301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 8301 transitions. [2021-05-03 15:11:09,701 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 8301 transitions. Word has length 29 [2021-05-03 15:11:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:09,702 INFO L480 AbstractCegarLoop]: Abstraction has 1945 states and 8301 transitions. [2021-05-03 15:11:09,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 8301 transitions. [2021-05-03 15:11:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:09,705 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:09,705 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:09,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:09,906 INFO L428 AbstractCegarLoop]: === Iteration 50 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:09,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:09,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2005583254, now seen corresponding path program 14 times [2021-05-03 15:11:09,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:09,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254680175] [2021-05-03 15:11:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254680175] [2021-05-03 15:11:10,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792885855] [2021-05-03 15:11:10,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:10,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:10,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:10,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:11:10,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:10,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:10,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:11:10,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:10,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:10,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:10,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-05-03 15:11:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:10,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:10,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:10,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073697537] [2021-05-03 15:11:10,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:10,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:10,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:10,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:10,433 INFO L87 Difference]: Start difference. First operand 1945 states and 8301 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:11,384 INFO L93 Difference]: Finished difference Result 2450 states and 10275 transitions. [2021-05-03 15:11:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 15:11:11,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:11,390 INFO L225 Difference]: With dead ends: 2450 [2021-05-03 15:11:11,391 INFO L226 Difference]: Without dead ends: 2435 [2021-05-03 15:11:11,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 917.5ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:11:11,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-05-03 15:11:11,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1942. [2021-05-03 15:11:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 4.2715095311695) internal successors, (8291), 1941 states have internal predecessors, (8291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 8291 transitions. [2021-05-03 15:11:11,424 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 8291 transitions. Word has length 29 [2021-05-03 15:11:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:11,424 INFO L480 AbstractCegarLoop]: Abstraction has 1942 states and 8291 transitions. [2021-05-03 15:11:11,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 8291 transitions. [2021-05-03 15:11:11,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:11,427 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:11,428 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:11,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-03 15:11:11,628 INFO L428 AbstractCegarLoop]: === Iteration 51 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1642415852, now seen corresponding path program 15 times [2021-05-03 15:11:11,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:11,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222709837] [2021-05-03 15:11:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:11,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222709837] [2021-05-03 15:11:11,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917509073] [2021-05-03 15:11:11,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:11,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:11:11,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:11,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:11,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:12,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-05-03 15:11:12,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:12,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:12,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:12,015 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:16 [2021-05-03 15:11:12,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:12,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:12,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 15:11:12,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633511377] [2021-05-03 15:11:12,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:12,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:12,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:12,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:12,085 INFO L87 Difference]: Start difference. First operand 1942 states and 8291 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:12,854 INFO L93 Difference]: Finished difference Result 2340 states and 9821 transitions. [2021-05-03 15:11:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:11:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:12,860 INFO L225 Difference]: With dead ends: 2340 [2021-05-03 15:11:12,861 INFO L226 Difference]: Without dead ends: 2325 [2021-05-03 15:11:12,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 702.3ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:11:12,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-05-03 15:11:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 1936. [2021-05-03 15:11:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1935 states have (on average 4.274935400516796) internal successors, (8272), 1935 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 8272 transitions. [2021-05-03 15:11:12,893 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 8272 transitions. Word has length 29 [2021-05-03 15:11:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:12,893 INFO L480 AbstractCegarLoop]: Abstraction has 1936 states and 8272 transitions. [2021-05-03 15:11:12,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 8272 transitions. [2021-05-03 15:11:12,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:12,897 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:12,897 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:13,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:13,098 INFO L428 AbstractCegarLoop]: === Iteration 52 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1042410156, now seen corresponding path program 16 times [2021-05-03 15:11:13,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:13,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985556003] [2021-05-03 15:11:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:13,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:13,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985556003] [2021-05-03 15:11:13,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214496957] [2021-05-03 15:11:13,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:13,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:13,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:13,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:13,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:13,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:13,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:13,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:13,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:13,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:11:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:13,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:13,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-05-03 15:11:13,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998595455] [2021-05-03 15:11:13,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:13,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:13,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:13,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:13,425 INFO L87 Difference]: Start difference. First operand 1936 states and 8272 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:13,593 INFO L93 Difference]: Finished difference Result 2451 states and 10304 transitions. [2021-05-03 15:11:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:13,594 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:13,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:13,601 INFO L225 Difference]: With dead ends: 2451 [2021-05-03 15:11:13,601 INFO L226 Difference]: Without dead ends: 2432 [2021-05-03 15:11:13,601 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-05-03 15:11:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2047. [2021-05-03 15:11:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 4.288367546432062) internal successors, (8774), 2046 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 8774 transitions. [2021-05-03 15:11:13,638 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 8774 transitions. Word has length 29 [2021-05-03 15:11:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:13,638 INFO L480 AbstractCegarLoop]: Abstraction has 2047 states and 8774 transitions. [2021-05-03 15:11:13,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:13,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 8774 transitions. [2021-05-03 15:11:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:13,643 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:13,643 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:13,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-03 15:11:13,856 INFO L428 AbstractCegarLoop]: === Iteration 53 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:13,856 INFO L82 PathProgramCache]: Analyzing trace with hash 379944670, now seen corresponding path program 17 times [2021-05-03 15:11:13,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:13,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409830372] [2021-05-03 15:11:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:14,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409830372] [2021-05-03 15:11:14,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83713708] [2021-05-03 15:11:14,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:14,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:14,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:14,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:14,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:14,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-05-03 15:11:14,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:14,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:14,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:14,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-05-03 15:11:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:14,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:14,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-05-03 15:11:14,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36864684] [2021-05-03 15:11:14,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:14,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:14,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:14,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:14,183 INFO L87 Difference]: Start difference. First operand 2047 states and 8774 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:14,333 INFO L93 Difference]: Finished difference Result 2467 states and 10341 transitions. [2021-05-03 15:11:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:14,340 INFO L225 Difference]: With dead ends: 2467 [2021-05-03 15:11:14,340 INFO L226 Difference]: Without dead ends: 2436 [2021-05-03 15:11:14,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 220.1ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:14,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-05-03 15:11:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1975. [2021-05-03 15:11:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1974 states have (on average 4.279128672745694) internal successors, (8447), 1974 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 8447 transitions. [2021-05-03 15:11:14,378 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 8447 transitions. Word has length 29 [2021-05-03 15:11:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:14,378 INFO L480 AbstractCegarLoop]: Abstraction has 1975 states and 8447 transitions. [2021-05-03 15:11:14,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 8447 transitions. [2021-05-03 15:11:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:14,382 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:14,382 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:14,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-03 15:11:14,582 INFO L428 AbstractCegarLoop]: === Iteration 54 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:14,583 INFO L82 PathProgramCache]: Analyzing trace with hash 418822894, now seen corresponding path program 18 times [2021-05-03 15:11:14,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:14,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211232425] [2021-05-03 15:11:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:14,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211232425] [2021-05-03 15:11:14,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416867643] [2021-05-03 15:11:14,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:14,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:11:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:14,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:14,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:14,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:14,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:14,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:14,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:14,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:14,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:14,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 15:11:14,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156147505] [2021-05-03 15:11:14,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:14,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:14,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:14,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:14,977 INFO L87 Difference]: Start difference. First operand 1975 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:15,788 INFO L93 Difference]: Finished difference Result 2297 states and 9673 transitions. [2021-05-03 15:11:15,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:11:15,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:15,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:15,794 INFO L225 Difference]: With dead ends: 2297 [2021-05-03 15:11:15,794 INFO L226 Difference]: Without dead ends: 2282 [2021-05-03 15:11:15,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 741.5ms TimeCoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:11:15,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2021-05-03 15:11:15,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 1945. [2021-05-03 15:11:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1944 states have (on average 4.275205761316872) internal successors, (8311), 1944 states have internal predecessors, (8311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 8311 transitions. [2021-05-03 15:11:15,824 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 8311 transitions. Word has length 29 [2021-05-03 15:11:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:15,824 INFO L480 AbstractCegarLoop]: Abstraction has 1945 states and 8311 transitions. [2021-05-03 15:11:15,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 8311 transitions. [2021-05-03 15:11:15,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:15,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:15,828 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:16,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:16,029 INFO L428 AbstractCegarLoop]: === Iteration 55 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:16,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:16,029 INFO L82 PathProgramCache]: Analyzing trace with hash -945227760, now seen corresponding path program 19 times [2021-05-03 15:11:16,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:16,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218938898] [2021-05-03 15:11:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:16,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218938898] [2021-05-03 15:11:16,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182930431] [2021-05-03 15:11:16,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:16,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:16,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:16,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-05-03 15:11:16,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:16,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:16,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:16,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-05-03 15:11:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:16,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:16,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-05-03 15:11:16,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123609021] [2021-05-03 15:11:16,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:16,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:16,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:16,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:16,336 INFO L87 Difference]: Start difference. First operand 1945 states and 8311 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:16,526 INFO L93 Difference]: Finished difference Result 2503 states and 10404 transitions. [2021-05-03 15:11:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:16,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:16,533 INFO L225 Difference]: With dead ends: 2503 [2021-05-03 15:11:16,533 INFO L226 Difference]: Without dead ends: 2484 [2021-05-03 15:11:16,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-05-03 15:11:16,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2041. [2021-05-03 15:11:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 4.284313725490196) internal successors, (8740), 2040 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 8740 transitions. [2021-05-03 15:11:16,568 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 8740 transitions. Word has length 29 [2021-05-03 15:11:16,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:16,568 INFO L480 AbstractCegarLoop]: Abstraction has 2041 states and 8740 transitions. [2021-05-03 15:11:16,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 8740 transitions. [2021-05-03 15:11:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:16,572 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:16,572 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:16,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-03 15:11:16,773 INFO L428 AbstractCegarLoop]: === Iteration 56 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:16,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:16,773 INFO L82 PathProgramCache]: Analyzing trace with hash 477127066, now seen corresponding path program 20 times [2021-05-03 15:11:16,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:16,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792303589] [2021-05-03 15:11:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:16,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792303589] [2021-05-03 15:11:16,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611086638] [2021-05-03 15:11:16,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:16,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:16,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:16,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:16,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:17,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:17,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:17,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:17,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:17,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:17,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:17,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:17,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 15:11:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033664396] [2021-05-03 15:11:17,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:17,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:17,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:17,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:17,174 INFO L87 Difference]: Start difference. First operand 2041 states and 8740 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:17,831 INFO L93 Difference]: Finished difference Result 2573 states and 10619 transitions. [2021-05-03 15:11:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:11:17,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:17,838 INFO L225 Difference]: With dead ends: 2573 [2021-05-03 15:11:17,838 INFO L226 Difference]: Without dead ends: 2560 [2021-05-03 15:11:17,839 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 625.1ms TimeCoverageRelationStatistics Valid=256, Invalid=800, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:11:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2021-05-03 15:11:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2041. [2021-05-03 15:11:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2041 states, 2040 states have (on average 4.282843137254902) internal successors, (8737), 2040 states have internal predecessors, (8737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2041 states to 2041 states and 8737 transitions. [2021-05-03 15:11:17,890 INFO L78 Accepts]: Start accepts. Automaton has 2041 states and 8737 transitions. Word has length 29 [2021-05-03 15:11:17,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:17,890 INFO L480 AbstractCegarLoop]: Abstraction has 2041 states and 8737 transitions. [2021-05-03 15:11:17,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:17,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2041 states and 8737 transitions. [2021-05-03 15:11:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:17,894 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:17,894 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:18,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-03 15:11:18,095 INFO L428 AbstractCegarLoop]: === Iteration 57 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:18,095 INFO L82 PathProgramCache]: Analyzing trace with hash 32025046, now seen corresponding path program 21 times [2021-05-03 15:11:18,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:18,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210500524] [2021-05-03 15:11:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:18,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210500524] [2021-05-03 15:11:18,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144195322] [2021-05-03 15:11:18,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:18,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:11:18,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:18,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:18,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:18,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:18,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:18,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:18,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:18,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:18,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:18,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:18,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 15:11:18,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845488804] [2021-05-03 15:11:18,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:18,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:18,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:18,473 INFO L87 Difference]: Start difference. First operand 2041 states and 8737 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:19,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:19,384 INFO L93 Difference]: Finished difference Result 2531 states and 10528 transitions. [2021-05-03 15:11:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:11:19,385 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:19,390 INFO L225 Difference]: With dead ends: 2531 [2021-05-03 15:11:19,390 INFO L226 Difference]: Without dead ends: 2516 [2021-05-03 15:11:19,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 758.9ms TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:11:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2021-05-03 15:11:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2048. [2021-05-03 15:11:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 2047 states have (on average 4.278456277479238) internal successors, (8758), 2047 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 8758 transitions. [2021-05-03 15:11:19,423 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 8758 transitions. Word has length 29 [2021-05-03 15:11:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:19,423 INFO L480 AbstractCegarLoop]: Abstraction has 2048 states and 8758 transitions. [2021-05-03 15:11:19,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 8758 transitions. [2021-05-03 15:11:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:19,426 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:19,426 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:19,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-03 15:11:19,627 INFO L428 AbstractCegarLoop]: === Iteration 58 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:19,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1748573256, now seen corresponding path program 22 times [2021-05-03 15:11:19,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:19,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067752700] [2021-05-03 15:11:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:19,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067752700] [2021-05-03 15:11:19,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493855613] [2021-05-03 15:11:19,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:19,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:19,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:19,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:19,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:19,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:19,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:19,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:19,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:11:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:19,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:19,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-05-03 15:11:19,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219527896] [2021-05-03 15:11:19,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:19,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:19,970 INFO L87 Difference]: Start difference. First operand 2048 states and 8758 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:20,144 INFO L93 Difference]: Finished difference Result 2461 states and 10290 transitions. [2021-05-03 15:11:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:20,151 INFO L225 Difference]: With dead ends: 2461 [2021-05-03 15:11:20,151 INFO L226 Difference]: Without dead ends: 2436 [2021-05-03 15:11:20,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-05-03 15:11:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1969. [2021-05-03 15:11:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 4.274898373983739) internal successors, (8413), 1968 states have internal predecessors, (8413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 8413 transitions. [2021-05-03 15:11:20,190 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 8413 transitions. Word has length 29 [2021-05-03 15:11:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:20,190 INFO L480 AbstractCegarLoop]: Abstraction has 1969 states and 8413 transitions. [2021-05-03 15:11:20,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:20,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 8413 transitions. [2021-05-03 15:11:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:20,193 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:20,193 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:20,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:20,394 INFO L428 AbstractCegarLoop]: === Iteration 59 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:20,394 INFO L82 PathProgramCache]: Analyzing trace with hash -2122928432, now seen corresponding path program 23 times [2021-05-03 15:11:20,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:20,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710991298] [2021-05-03 15:11:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:20,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710991298] [2021-05-03 15:11:20,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260140469] [2021-05-03 15:11:20,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:20,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:11:20,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:11:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:20,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:20,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:20,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:20,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:20,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:20,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:32 [2021-05-03 15:11:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:20,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:20,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 15:11:20,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474899710] [2021-05-03 15:11:20,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:11:20,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:11:20,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:20,839 INFO L87 Difference]: Start difference. First operand 1969 states and 8413 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:21,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:21,240 INFO L93 Difference]: Finished difference Result 2079 states and 8757 transitions. [2021-05-03 15:11:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:11:21,240 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:21,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:21,246 INFO L225 Difference]: With dead ends: 2079 [2021-05-03 15:11:21,246 INFO L226 Difference]: Without dead ends: 2033 [2021-05-03 15:11:21,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:11:21,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-05-03 15:11:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1969. [2021-05-03 15:11:21,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 4.272865853658536) internal successors, (8409), 1968 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:21,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 8409 transitions. [2021-05-03 15:11:21,278 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 8409 transitions. Word has length 29 [2021-05-03 15:11:21,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:21,278 INFO L480 AbstractCegarLoop]: Abstraction has 1969 states and 8409 transitions. [2021-05-03 15:11:21,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:21,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 8409 transitions. [2021-05-03 15:11:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:21,282 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:21,282 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:21,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:21,482 INFO L428 AbstractCegarLoop]: === Iteration 60 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:21,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash 837938, now seen corresponding path program 1 times [2021-05-03 15:11:21,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:21,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538459473] [2021-05-03 15:11:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:21,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538459473] [2021-05-03 15:11:21,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863666924] [2021-05-03 15:11:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:21,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:21,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:21,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:21,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:21,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:21,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-05-03 15:11:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:21,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:21,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-05-03 15:11:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235505598] [2021-05-03 15:11:21,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:21,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:21,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:21,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:21,872 INFO L87 Difference]: Start difference. First operand 1969 states and 8409 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:22,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:22,275 INFO L93 Difference]: Finished difference Result 2221 states and 9307 transitions. [2021-05-03 15:11:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:22,275 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:22,280 INFO L225 Difference]: With dead ends: 2221 [2021-05-03 15:11:22,280 INFO L226 Difference]: Without dead ends: 2202 [2021-05-03 15:11:22,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 15:11:22,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-05-03 15:11:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 2071. [2021-05-03 15:11:22,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 2070 states have (on average 4.260869565217392) internal successors, (8820), 2070 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 8820 transitions. [2021-05-03 15:11:22,312 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 8820 transitions. Word has length 29 [2021-05-03 15:11:22,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:22,312 INFO L480 AbstractCegarLoop]: Abstraction has 2071 states and 8820 transitions. [2021-05-03 15:11:22,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:22,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 8820 transitions. [2021-05-03 15:11:22,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:22,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:22,316 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:22,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:22,516 INFO L428 AbstractCegarLoop]: === Iteration 61 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash -3932270, now seen corresponding path program 1 times [2021-05-03 15:11:22,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:22,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839325884] [2021-05-03 15:11:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:22,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:22,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839325884] [2021-05-03 15:11:22,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79496018] [2021-05-03 15:11:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:22,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:22,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:22,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:22,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:22,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:22,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-05-03 15:11:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:22,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:22,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 15:11:22,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410636737] [2021-05-03 15:11:22,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:22,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:22,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:22,839 INFO L87 Difference]: Start difference. First operand 2071 states and 8820 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:23,135 INFO L93 Difference]: Finished difference Result 2230 states and 9328 transitions. [2021-05-03 15:11:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:23,135 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:23,140 INFO L225 Difference]: With dead ends: 2230 [2021-05-03 15:11:23,140 INFO L226 Difference]: Without dead ends: 2211 [2021-05-03 15:11:23,140 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-05-03 15:11:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2073. [2021-05-03 15:11:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 2072 states have (on average 4.260617760617761) internal successors, (8828), 2072 states have internal predecessors, (8828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 8828 transitions. [2021-05-03 15:11:23,168 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 8828 transitions. Word has length 29 [2021-05-03 15:11:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:23,168 INFO L480 AbstractCegarLoop]: Abstraction has 2073 states and 8828 transitions. [2021-05-03 15:11:23,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 8828 transitions. [2021-05-03 15:11:23,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:23,171 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:23,171 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:23,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:23,372 INFO L428 AbstractCegarLoop]: === Iteration 62 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:23,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1006933494, now seen corresponding path program 2 times [2021-05-03 15:11:23,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:23,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240964413] [2021-05-03 15:11:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:23,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240964413] [2021-05-03 15:11:23,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978782162] [2021-05-03 15:11:23,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:23,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:23,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:23,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:23,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:23,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:23,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:11:23,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:23,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:23,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:23,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:11:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:23,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:23,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:23,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259370857] [2021-05-03 15:11:23,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:23,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:23,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:23,824 INFO L87 Difference]: Start difference. First operand 2073 states and 8828 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:24,707 INFO L93 Difference]: Finished difference Result 2698 states and 11333 transitions. [2021-05-03 15:11:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:11:24,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:24,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:24,714 INFO L225 Difference]: With dead ends: 2698 [2021-05-03 15:11:24,714 INFO L226 Difference]: Without dead ends: 2679 [2021-05-03 15:11:24,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 778.0ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:11:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2679 states. [2021-05-03 15:11:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2679 to 2103. [2021-05-03 15:11:24,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 4.264509990485252) internal successors, (8964), 2102 states have internal predecessors, (8964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 8964 transitions. [2021-05-03 15:11:24,746 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 8964 transitions. Word has length 29 [2021-05-03 15:11:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:24,747 INFO L480 AbstractCegarLoop]: Abstraction has 2103 states and 8964 transitions. [2021-05-03 15:11:24,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:24,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 8964 transitions. [2021-05-03 15:11:24,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:24,750 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:24,750 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:24,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-03 15:11:24,951 INFO L428 AbstractCegarLoop]: === Iteration 63 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:24,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:24,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1570530918, now seen corresponding path program 3 times [2021-05-03 15:11:24,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:24,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946175616] [2021-05-03 15:11:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:25,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946175616] [2021-05-03 15:11:25,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010883217] [2021-05-03 15:11:25,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:25,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:11:25,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:25,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:25,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:25,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:11:25,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:25,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:25,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:25,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:11:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:25,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:25,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:25,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794957090] [2021-05-03 15:11:25,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:25,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:25,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:25,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:25,417 INFO L87 Difference]: Start difference. First operand 2103 states and 8964 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:26,288 INFO L93 Difference]: Finished difference Result 2867 states and 11944 transitions. [2021-05-03 15:11:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:11:26,288 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:26,295 INFO L225 Difference]: With dead ends: 2867 [2021-05-03 15:11:26,295 INFO L226 Difference]: Without dead ends: 2848 [2021-05-03 15:11:26,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 773.9ms TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 15:11:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-05-03 15:11:26,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2173. [2021-05-03 15:11:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2173 states, 2172 states have (on average 4.266574585635359) internal successors, (9267), 2172 states have internal predecessors, (9267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2173 states to 2173 states and 9267 transitions. [2021-05-03 15:11:26,329 INFO L78 Accepts]: Start accepts. Automaton has 2173 states and 9267 transitions. Word has length 29 [2021-05-03 15:11:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:26,329 INFO L480 AbstractCegarLoop]: Abstraction has 2173 states and 9267 transitions. [2021-05-03 15:11:26,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2173 states and 9267 transitions. [2021-05-03 15:11:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:26,361 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:26,361 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:26,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:26,562 INFO L428 AbstractCegarLoop]: === Iteration 64 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:26,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:26,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1941755924, now seen corresponding path program 4 times [2021-05-03 15:11:26,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:26,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126669153] [2021-05-03 15:11:26,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:26,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126669153] [2021-05-03 15:11:26,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991902358] [2021-05-03 15:11:26,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:26,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:26,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:26,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:26,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:26,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:26,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:26,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:26,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:26,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 15:11:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:26,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:26,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 15:11:26,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836877613] [2021-05-03 15:11:26,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:11:26,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:26,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:11:26,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:11:26,970 INFO L87 Difference]: Start difference. First operand 2173 states and 9267 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:27,345 INFO L93 Difference]: Finished difference Result 2685 states and 11221 transitions. [2021-05-03 15:11:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:27,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:27,353 INFO L225 Difference]: With dead ends: 2685 [2021-05-03 15:11:27,353 INFO L226 Difference]: Without dead ends: 2670 [2021-05-03 15:11:27,354 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 366.6ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2670 states. [2021-05-03 15:11:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2670 to 2182. [2021-05-03 15:11:27,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 4.261348005502064) internal successors, (9294), 2181 states have internal predecessors, (9294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:27,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 9294 transitions. [2021-05-03 15:11:27,399 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 9294 transitions. Word has length 29 [2021-05-03 15:11:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:27,400 INFO L480 AbstractCegarLoop]: Abstraction has 2182 states and 9294 transitions. [2021-05-03 15:11:27,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 9294 transitions. [2021-05-03 15:11:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:27,405 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:27,405 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:27,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 15:11:27,621 INFO L428 AbstractCegarLoop]: === Iteration 65 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:27,621 INFO L82 PathProgramCache]: Analyzing trace with hash 684817930, now seen corresponding path program 5 times [2021-05-03 15:11:27,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:27,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121710534] [2021-05-03 15:11:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:27,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121710534] [2021-05-03 15:11:27,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508937910] [2021-05-03 15:11:27,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:27,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:27,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:27,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:11:27,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:27,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-05-03 15:11:27,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:27,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:27,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:27,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-05-03 15:11:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:28,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:28,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-05-03 15:11:28,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048770365] [2021-05-03 15:11:28,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:11:28,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:11:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:28,021 INFO L87 Difference]: Start difference. First operand 2182 states and 9294 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:28,528 INFO L93 Difference]: Finished difference Result 2781 states and 11595 transitions. [2021-05-03 15:11:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:11:28,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:28,536 INFO L225 Difference]: With dead ends: 2781 [2021-05-03 15:11:28,537 INFO L226 Difference]: Without dead ends: 2755 [2021-05-03 15:11:28,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 475.0ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:11:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2021-05-03 15:11:28,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 2087. [2021-05-03 15:11:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 4.2737296260786195) internal successors, (8915), 2086 states have internal predecessors, (8915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:28,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 8915 transitions. [2021-05-03 15:11:28,575 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 8915 transitions. Word has length 29 [2021-05-03 15:11:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:28,575 INFO L480 AbstractCegarLoop]: Abstraction has 2087 states and 8915 transitions. [2021-05-03 15:11:28,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 8915 transitions. [2021-05-03 15:11:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:28,579 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:28,579 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:28,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:28,781 INFO L428 AbstractCegarLoop]: === Iteration 66 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:28,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:28,781 INFO L82 PathProgramCache]: Analyzing trace with hash -420261250, now seen corresponding path program 2 times [2021-05-03 15:11:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:28,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637395460] [2021-05-03 15:11:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:28,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637395460] [2021-05-03 15:11:28,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675955939] [2021-05-03 15:11:28,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:28,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:28,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:28,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:28,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:29,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:29,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:11:29,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:29,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:29,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:29,023 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:11:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:29,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:29,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:11:29,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690020516] [2021-05-03 15:11:29,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:29,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:29,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:29,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:29,117 INFO L87 Difference]: Start difference. First operand 2087 states and 8915 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:29,957 INFO L93 Difference]: Finished difference Result 2824 states and 11801 transitions. [2021-05-03 15:11:29,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:11:29,958 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:29,964 INFO L225 Difference]: With dead ends: 2824 [2021-05-03 15:11:29,964 INFO L226 Difference]: Without dead ends: 2805 [2021-05-03 15:11:29,965 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 730.3ms TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:11:29,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2021-05-03 15:11:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2117. [2021-05-03 15:11:29,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 4.272684310018904) internal successors, (9041), 2116 states have internal predecessors, (9041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:30,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 9041 transitions. [2021-05-03 15:11:30,000 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 9041 transitions. Word has length 29 [2021-05-03 15:11:30,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:30,000 INFO L480 AbstractCegarLoop]: Abstraction has 2117 states and 9041 transitions. [2021-05-03 15:11:30,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:30,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 9041 transitions. [2021-05-03 15:11:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:30,004 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:30,004 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:30,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 15:11:30,204 INFO L428 AbstractCegarLoop]: === Iteration 67 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:30,205 INFO L82 PathProgramCache]: Analyzing trace with hash 555510786, now seen corresponding path program 3 times [2021-05-03 15:11:30,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:30,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226806184] [2021-05-03 15:11:30,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:30,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226806184] [2021-05-03 15:11:30,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910040067] [2021-05-03 15:11:30,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:30,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:11:30,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:30,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:30,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:30,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:30,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:11:30,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:30,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:30,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:30,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:11:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:30,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:30,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:11:30,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025204492] [2021-05-03 15:11:30,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:30,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:30,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:30,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:30,519 INFO L87 Difference]: Start difference. First operand 2117 states and 9041 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:31,315 INFO L93 Difference]: Finished difference Result 3283 states and 13634 transitions. [2021-05-03 15:11:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:11:31,316 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:31,326 INFO L225 Difference]: With dead ends: 3283 [2021-05-03 15:11:31,326 INFO L226 Difference]: Without dead ends: 3264 [2021-05-03 15:11:31,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:11:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3264 states. [2021-05-03 15:11:31,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3264 to 2209. [2021-05-03 15:11:31,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 4.2726449275362315) internal successors, (9434), 2208 states have internal predecessors, (9434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 9434 transitions. [2021-05-03 15:11:31,372 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 9434 transitions. Word has length 29 [2021-05-03 15:11:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:31,372 INFO L480 AbstractCegarLoop]: Abstraction has 2209 states and 9434 transitions. [2021-05-03 15:11:31,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 9434 transitions. [2021-05-03 15:11:31,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:31,377 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:31,377 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:31,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:31,592 INFO L428 AbstractCegarLoop]: === Iteration 68 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:31,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:31,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1977865612, now seen corresponding path program 4 times [2021-05-03 15:11:31,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:31,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159804561] [2021-05-03 15:11:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:31,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159804561] [2021-05-03 15:11:31,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460044675] [2021-05-03 15:11:31,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:31,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:31,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:31,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:31,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:31,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:31,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:31,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:31,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:31,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-05-03 15:11:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:31,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:31,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-03 15:11:31,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180968097] [2021-05-03 15:11:31,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:31,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:31,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:31,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:31,870 INFO L87 Difference]: Start difference. First operand 2209 states and 9434 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:32,111 INFO L93 Difference]: Finished difference Result 2773 states and 11598 transitions. [2021-05-03 15:11:32,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:32,111 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:32,117 INFO L225 Difference]: With dead ends: 2773 [2021-05-03 15:11:32,118 INFO L226 Difference]: Without dead ends: 2742 [2021-05-03 15:11:32,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2742 states. [2021-05-03 15:11:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2742 to 2069. [2021-05-03 15:11:32,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 4.28046421663443) internal successors, (8852), 2068 states have internal predecessors, (8852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:32,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 8852 transitions. [2021-05-03 15:11:32,175 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 8852 transitions. Word has length 29 [2021-05-03 15:11:32,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:32,175 INFO L480 AbstractCegarLoop]: Abstraction has 2069 states and 8852 transitions. [2021-05-03 15:11:32,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:32,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 8852 transitions. [2021-05-03 15:11:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:32,180 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:32,180 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:32,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:32,402 INFO L428 AbstractCegarLoop]: === Iteration 69 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:32,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1004214994, now seen corresponding path program 6 times [2021-05-03 15:11:32,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:32,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649420245] [2021-05-03 15:11:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:32,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649420245] [2021-05-03 15:11:32,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117280037] [2021-05-03 15:11:32,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:32,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:11:32,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:32,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:32,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:32,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:32,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:32,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:32,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:32,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:32,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:32,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399016738] [2021-05-03 15:11:32,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:32,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:32,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:32,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:32,781 INFO L87 Difference]: Start difference. First operand 2069 states and 8852 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:33,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:33,712 INFO L93 Difference]: Finished difference Result 2735 states and 11395 transitions. [2021-05-03 15:11:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:11:33,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:33,721 INFO L225 Difference]: With dead ends: 2735 [2021-05-03 15:11:33,722 INFO L226 Difference]: Without dead ends: 2716 [2021-05-03 15:11:33,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 803.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:11:33,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2716 states. [2021-05-03 15:11:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2716 to 2169. [2021-05-03 15:11:33,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2169 states, 2168 states have (on average 4.282287822878229) internal successors, (9284), 2168 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2169 states to 2169 states and 9284 transitions. [2021-05-03 15:11:33,763 INFO L78 Accepts]: Start accepts. Automaton has 2169 states and 9284 transitions. Word has length 29 [2021-05-03 15:11:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:33,763 INFO L480 AbstractCegarLoop]: Abstraction has 2169 states and 9284 transitions. [2021-05-03 15:11:33,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2169 states and 9284 transitions. [2021-05-03 15:11:33,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:33,767 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:33,767 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:33,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-03 15:11:33,967 INFO L428 AbstractCegarLoop]: === Iteration 70 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:33,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:33,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1987479696, now seen corresponding path program 7 times [2021-05-03 15:11:33,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:33,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065478457] [2021-05-03 15:11:33,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:34,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065478457] [2021-05-03 15:11:34,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144539284] [2021-05-03 15:11:34,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:34,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:34,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:34,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:34,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:34,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:34,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:34,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:11:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:34,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:34,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 15:11:34,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405791023] [2021-05-03 15:11:34,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:11:34,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:11:34,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:11:34,334 INFO L87 Difference]: Start difference. First operand 2169 states and 9284 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:34,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:34,572 INFO L93 Difference]: Finished difference Result 2601 states and 10854 transitions. [2021-05-03 15:11:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:34,579 INFO L225 Difference]: With dead ends: 2601 [2021-05-03 15:11:34,579 INFO L226 Difference]: Without dead ends: 2586 [2021-05-03 15:11:34,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 283.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:34,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-05-03 15:11:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2181. [2021-05-03 15:11:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 4.275229357798165) internal successors, (9320), 2180 states have internal predecessors, (9320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 9320 transitions. [2021-05-03 15:11:34,617 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 9320 transitions. Word has length 29 [2021-05-03 15:11:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:34,617 INFO L480 AbstractCegarLoop]: Abstraction has 2181 states and 9320 transitions. [2021-05-03 15:11:34,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 9320 transitions. [2021-05-03 15:11:34,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:34,621 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:34,621 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:34,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:34,822 INFO L428 AbstractCegarLoop]: === Iteration 71 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:34,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:34,822 INFO L82 PathProgramCache]: Analyzing trace with hash 639094158, now seen corresponding path program 8 times [2021-05-03 15:11:34,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:34,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018032790] [2021-05-03 15:11:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:35,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018032790] [2021-05-03 15:11:35,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434481983] [2021-05-03 15:11:35,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:35,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:35,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:35,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:35,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:35,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:35,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:35,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:35,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:35,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:35,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:35,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:35,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:35,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631131336] [2021-05-03 15:11:35,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:35,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:35,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:35,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:35,314 INFO L87 Difference]: Start difference. First operand 2181 states and 9320 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:36,016 INFO L93 Difference]: Finished difference Result 2637 states and 10948 transitions. [2021-05-03 15:11:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:11:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:36,023 INFO L225 Difference]: With dead ends: 2637 [2021-05-03 15:11:36,023 INFO L226 Difference]: Without dead ends: 2623 [2021-05-03 15:11:36,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 680.4ms TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:11:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2623 states. [2021-05-03 15:11:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2623 to 2174. [2021-05-03 15:11:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 4.277956741831569) internal successors, (9296), 2173 states have internal predecessors, (9296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 9296 transitions. [2021-05-03 15:11:36,069 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 9296 transitions. Word has length 29 [2021-05-03 15:11:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:36,069 INFO L480 AbstractCegarLoop]: Abstraction has 2174 states and 9296 transitions. [2021-05-03 15:11:36,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 9296 transitions. [2021-05-03 15:11:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:36,074 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:36,075 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:36,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:36,287 INFO L428 AbstractCegarLoop]: === Iteration 72 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2040866216, now seen corresponding path program 9 times [2021-05-03 15:11:36,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:36,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843465490] [2021-05-03 15:11:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:36,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843465490] [2021-05-03 15:11:36,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708570078] [2021-05-03 15:11:36,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:36,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:11:36,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:36,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:36,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:36,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:36,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:36,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:36,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:36,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:36,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:36,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:36,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:36,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074193106] [2021-05-03 15:11:36,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:36,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:36,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:36,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:36,651 INFO L87 Difference]: Start difference. First operand 2174 states and 9296 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:37,340 INFO L93 Difference]: Finished difference Result 2664 states and 11023 transitions. [2021-05-03 15:11:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:11:37,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:37,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:37,346 INFO L225 Difference]: With dead ends: 2664 [2021-05-03 15:11:37,347 INFO L226 Difference]: Without dead ends: 2641 [2021-05-03 15:11:37,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 626.3ms TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:11:37,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-05-03 15:11:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2111. [2021-05-03 15:11:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2110 states have (on average 4.27345971563981) internal successors, (9017), 2110 states have internal predecessors, (9017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:37,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 9017 transitions. [2021-05-03 15:11:37,381 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 9017 transitions. Word has length 29 [2021-05-03 15:11:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:37,382 INFO L480 AbstractCegarLoop]: Abstraction has 2111 states and 9017 transitions. [2021-05-03 15:11:37,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 9017 transitions. [2021-05-03 15:11:37,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:37,385 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:37,385 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:37,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-03 15:11:37,586 INFO L428 AbstractCegarLoop]: === Iteration 73 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:37,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:37,586 INFO L82 PathProgramCache]: Analyzing trace with hash 548011288, now seen corresponding path program 10 times [2021-05-03 15:11:37,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:37,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599326050] [2021-05-03 15:11:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599326050] [2021-05-03 15:11:37,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178922887] [2021-05-03 15:11:37,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:37,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:37,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:37,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:37,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:37,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:37,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:37,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:37,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:37,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:11:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:37,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:37,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-05-03 15:11:37,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828993482] [2021-05-03 15:11:37,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:37,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:37,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:37,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:37,930 INFO L87 Difference]: Start difference. First operand 2111 states and 9017 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:38,200 INFO L93 Difference]: Finished difference Result 2220 states and 9385 transitions. [2021-05-03 15:11:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:38,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:38,206 INFO L225 Difference]: With dead ends: 2220 [2021-05-03 15:11:38,206 INFO L226 Difference]: Without dead ends: 2205 [2021-05-03 15:11:38,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-05-03 15:11:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 2117. [2021-05-03 15:11:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 4.2684310018903595) internal successors, (9032), 2116 states have internal predecessors, (9032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 9032 transitions. [2021-05-03 15:11:38,238 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 9032 transitions. Word has length 29 [2021-05-03 15:11:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:38,238 INFO L480 AbstractCegarLoop]: Abstraction has 2117 states and 9032 transitions. [2021-05-03 15:11:38,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 9032 transitions. [2021-05-03 15:11:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:38,241 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:38,242 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:38,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:38,445 INFO L428 AbstractCegarLoop]: === Iteration 74 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:38,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:38,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1085301608, now seen corresponding path program 11 times [2021-05-03 15:11:38,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:38,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951754817] [2021-05-03 15:11:38,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:38,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951754817] [2021-05-03 15:11:38,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413906414] [2021-05-03 15:11:38,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:38,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:11:38,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:38,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:11:38,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:38,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:38,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:38,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:38,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:38,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-05-03 15:11:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:38,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:38,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-03 15:11:38,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455531859] [2021-05-03 15:11:38,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:38,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:38,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:38,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:38,766 INFO L87 Difference]: Start difference. First operand 2117 states and 9032 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:39,052 INFO L93 Difference]: Finished difference Result 2535 states and 10680 transitions. [2021-05-03 15:11:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:11:39,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:39,058 INFO L225 Difference]: With dead ends: 2535 [2021-05-03 15:11:39,058 INFO L226 Difference]: Without dead ends: 2521 [2021-05-03 15:11:39,059 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-05-03 15:11:39,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2108. [2021-05-03 15:11:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 4.273849074513526) internal successors, (9005), 2107 states have internal predecessors, (9005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 9005 transitions. [2021-05-03 15:11:39,093 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 9005 transitions. Word has length 29 [2021-05-03 15:11:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:39,093 INFO L480 AbstractCegarLoop]: Abstraction has 2108 states and 9005 transitions. [2021-05-03 15:11:39,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 9005 transitions. [2021-05-03 15:11:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:39,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:39,096 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:39,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-03 15:11:39,297 INFO L428 AbstractCegarLoop]: === Iteration 75 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:39,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:39,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2051190826, now seen corresponding path program 12 times [2021-05-03 15:11:39,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:39,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175896664] [2021-05-03 15:11:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:39,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175896664] [2021-05-03 15:11:39,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325860933] [2021-05-03 15:11:39,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:39,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:11:39,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:39,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:39,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:39,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:39,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:39,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:39,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:39,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:39,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:39,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:39,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:39,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138815023] [2021-05-03 15:11:39,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:39,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:39,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:39,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:39,704 INFO L87 Difference]: Start difference. First operand 2108 states and 9005 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:40,699 INFO L93 Difference]: Finished difference Result 2855 states and 11811 transitions. [2021-05-03 15:11:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:11:40,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:40,705 INFO L225 Difference]: With dead ends: 2855 [2021-05-03 15:11:40,706 INFO L226 Difference]: Without dead ends: 2836 [2021-05-03 15:11:40,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 909.2ms TimeCoverageRelationStatistics Valid=287, Invalid=1119, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:11:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2021-05-03 15:11:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2205. [2021-05-03 15:11:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2205 states, 2204 states have (on average 4.280399274047187) internal successors, (9434), 2204 states have internal predecessors, (9434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:40,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2205 states to 2205 states and 9434 transitions. [2021-05-03 15:11:40,739 INFO L78 Accepts]: Start accepts. Automaton has 2205 states and 9434 transitions. Word has length 29 [2021-05-03 15:11:40,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:40,739 INFO L480 AbstractCegarLoop]: Abstraction has 2205 states and 9434 transitions. [2021-05-03 15:11:40,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:40,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2205 states and 9434 transitions. [2021-05-03 15:11:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:40,742 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:40,742 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:40,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 15:11:40,945 INFO L428 AbstractCegarLoop]: === Iteration 76 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -747918220, now seen corresponding path program 13 times [2021-05-03 15:11:40,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:40,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080042193] [2021-05-03 15:11:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:41,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:41,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080042193] [2021-05-03 15:11:41,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97974589] [2021-05-03 15:11:41,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:41,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:41,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:41,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:41,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:41,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:11:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:41,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:41,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-05-03 15:11:41,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663502669] [2021-05-03 15:11:41,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:11:41,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:41,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:11:41,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:11:41,342 INFO L87 Difference]: Start difference. First operand 2205 states and 9434 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:41,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:41,602 INFO L93 Difference]: Finished difference Result 2640 states and 11076 transitions. [2021-05-03 15:11:41,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:41,603 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:41,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:41,609 INFO L225 Difference]: With dead ends: 2640 [2021-05-03 15:11:41,610 INFO L226 Difference]: Without dead ends: 2625 [2021-05-03 15:11:41,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-05-03 15:11:41,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2214. [2021-05-03 15:11:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2214 states, 2213 states have (on average 4.27519204699503) internal successors, (9461), 2213 states have internal predecessors, (9461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2214 states to 2214 states and 9461 transitions. [2021-05-03 15:11:41,647 INFO L78 Accepts]: Start accepts. Automaton has 2214 states and 9461 transitions. Word has length 29 [2021-05-03 15:11:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:41,647 INFO L480 AbstractCegarLoop]: Abstraction has 2214 states and 9461 transitions. [2021-05-03 15:11:41,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2214 states and 9461 transitions. [2021-05-03 15:11:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:41,651 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:41,651 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:41,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 15:11:41,852 INFO L428 AbstractCegarLoop]: === Iteration 77 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:41,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:41,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1878655634, now seen corresponding path program 14 times [2021-05-03 15:11:41,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:41,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717485201] [2021-05-03 15:11:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:42,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:42,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717485201] [2021-05-03 15:11:42,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916594997] [2021-05-03 15:11:42,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:42,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:42,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:42,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:42,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:42,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:42,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:42,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:42,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:42,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:42,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:42,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:42,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:42,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904669885] [2021-05-03 15:11:42,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:42,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:42,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:42,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:42,211 INFO L87 Difference]: Start difference. First operand 2214 states and 9461 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:42,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:42,889 INFO L93 Difference]: Finished difference Result 2735 states and 11306 transitions. [2021-05-03 15:11:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:11:42,889 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:42,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:42,896 INFO L225 Difference]: With dead ends: 2735 [2021-05-03 15:11:42,896 INFO L226 Difference]: Without dead ends: 2721 [2021-05-03 15:11:42,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 625.9ms TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 15:11:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-05-03 15:11:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2207. [2021-05-03 15:11:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 4.277878513145965) internal successors, (9437), 2206 states have internal predecessors, (9437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:42,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 9437 transitions. [2021-05-03 15:11:42,932 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 9437 transitions. Word has length 29 [2021-05-03 15:11:42,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:42,932 INFO L480 AbstractCegarLoop]: Abstraction has 2207 states and 9437 transitions. [2021-05-03 15:11:42,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 9437 transitions. [2021-05-03 15:11:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:42,936 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:42,936 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:43,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:43,137 INFO L428 AbstractCegarLoop]: === Iteration 78 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:43,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:43,137 INFO L82 PathProgramCache]: Analyzing trace with hash -801304740, now seen corresponding path program 15 times [2021-05-03 15:11:43,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:43,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582086703] [2021-05-03 15:11:43,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:43,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582086703] [2021-05-03 15:11:43,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306558280] [2021-05-03 15:11:43,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:43,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:11:43,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:43,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:43,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:43,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:43,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:43,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:43,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:43,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:43,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:43,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:43,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-05-03 15:11:43,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174308094] [2021-05-03 15:11:43,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 15:11:43,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:43,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 15:11:43,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:43,613 INFO L87 Difference]: Start difference. First operand 2207 states and 9437 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:44,254 INFO L93 Difference]: Finished difference Result 2703 states and 11235 transitions. [2021-05-03 15:11:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:11:44,255 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:44,261 INFO L225 Difference]: With dead ends: 2703 [2021-05-03 15:11:44,261 INFO L226 Difference]: Without dead ends: 2680 [2021-05-03 15:11:44,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 669.2ms TimeCoverageRelationStatistics Valid=251, Invalid=805, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:11:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-05-03 15:11:44,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2135. [2021-05-03 15:11:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 4.278819119025305) internal successors, (9131), 2134 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 9131 transitions. [2021-05-03 15:11:44,292 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 9131 transitions. Word has length 29 [2021-05-03 15:11:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:44,292 INFO L480 AbstractCegarLoop]: Abstraction has 2135 states and 9131 transitions. [2021-05-03 15:11:44,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 9131 transitions. [2021-05-03 15:11:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:44,296 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:44,296 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:44,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:44,496 INFO L428 AbstractCegarLoop]: === Iteration 79 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:44,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:44,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1337845358, now seen corresponding path program 16 times [2021-05-03 15:11:44,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:44,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639736790] [2021-05-03 15:11:44,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:44,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639736790] [2021-05-03 15:11:44,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514576454] [2021-05-03 15:11:44,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:44,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:44,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:44,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:44,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:44,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:11:44,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-05-03 15:11:44,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:44,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:44,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:44,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-05-03 15:11:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:44,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:44,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-05-03 15:11:44,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678701472] [2021-05-03 15:11:44,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:11:44,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:44,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:11:44,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:11:44,835 INFO L87 Difference]: Start difference. First operand 2135 states and 9131 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:45,085 INFO L93 Difference]: Finished difference Result 2273 states and 9622 transitions. [2021-05-03 15:11:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:45,091 INFO L225 Difference]: With dead ends: 2273 [2021-05-03 15:11:45,091 INFO L226 Difference]: Without dead ends: 2254 [2021-05-03 15:11:45,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-05-03 15:11:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2138. [2021-05-03 15:11:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2138 states, 2137 states have (on average 4.27749181094993) internal successors, (9141), 2137 states have internal predecessors, (9141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:45,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 9141 transitions. [2021-05-03 15:11:45,124 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 9141 transitions. Word has length 29 [2021-05-03 15:11:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:45,124 INFO L480 AbstractCegarLoop]: Abstraction has 2138 states and 9141 transitions. [2021-05-03 15:11:45,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 9141 transitions. [2021-05-03 15:11:45,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:45,127 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:45,127 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:45,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:45,328 INFO L428 AbstractCegarLoop]: === Iteration 80 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1901442782, now seen corresponding path program 17 times [2021-05-03 15:11:45,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:45,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795345257] [2021-05-03 15:11:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:45,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795345257] [2021-05-03 15:11:45,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571577440] [2021-05-03 15:11:45,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:45,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:45,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:45,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 15:11:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:45,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:45,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:45,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:45,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:45,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-05-03 15:11:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:45,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:45,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-03 15:11:45,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567226776] [2021-05-03 15:11:45,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:45,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:45,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:45,701 INFO L87 Difference]: Start difference. First operand 2138 states and 9141 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:45,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:45,974 INFO L93 Difference]: Finished difference Result 2597 states and 10879 transitions. [2021-05-03 15:11:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:11:45,974 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:45,981 INFO L225 Difference]: With dead ends: 2597 [2021-05-03 15:11:45,981 INFO L226 Difference]: Without dead ends: 2574 [2021-05-03 15:11:45,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:45,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-05-03 15:11:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2108. [2021-05-03 15:11:46,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 2107 states have (on average 4.273849074513526) internal successors, (9005), 2107 states have internal predecessors, (9005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:46,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 9005 transitions. [2021-05-03 15:11:46,016 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 9005 transitions. Word has length 29 [2021-05-03 15:11:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:46,016 INFO L480 AbstractCegarLoop]: Abstraction has 2108 states and 9005 transitions. [2021-05-03 15:11:46,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 9005 transitions. [2021-05-03 15:11:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:46,019 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:46,020 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:46,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:46,220 INFO L428 AbstractCegarLoop]: === Iteration 81 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:46,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash -865854478, now seen corresponding path program 5 times [2021-05-03 15:11:46,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:46,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261216968] [2021-05-03 15:11:46,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:46,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261216968] [2021-05-03 15:11:46,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200307525] [2021-05-03 15:11:46,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:46,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:11:46,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:46,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:46,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:46,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:46,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:46,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:46,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:46,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:11:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:46,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:46,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 15:11:46,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36649517] [2021-05-03 15:11:46,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:46,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:46,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:46,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:46,606 INFO L87 Difference]: Start difference. First operand 2108 states and 9005 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:46,919 INFO L93 Difference]: Finished difference Result 2684 states and 11246 transitions. [2021-05-03 15:11:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:11:46,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:46,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:46,926 INFO L225 Difference]: With dead ends: 2684 [2021-05-03 15:11:46,926 INFO L226 Difference]: Without dead ends: 2665 [2021-05-03 15:11:46,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 339.0ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:46,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-05-03 15:11:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2239. [2021-05-03 15:11:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2238 states have (on average 4.270330652368186) internal successors, (9557), 2238 states have internal predecessors, (9557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 9557 transitions. [2021-05-03 15:11:46,963 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 9557 transitions. Word has length 29 [2021-05-03 15:11:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:46,963 INFO L480 AbstractCegarLoop]: Abstraction has 2239 states and 9557 transitions. [2021-05-03 15:11:46,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 9557 transitions. [2021-05-03 15:11:46,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:46,967 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:46,967 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:47,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-05-03 15:11:47,168 INFO L428 AbstractCegarLoop]: === Iteration 82 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:47,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:47,168 INFO L82 PathProgramCache]: Analyzing trace with hash 556500348, now seen corresponding path program 6 times [2021-05-03 15:11:47,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:47,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142246461] [2021-05-03 15:11:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:47,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142246461] [2021-05-03 15:11:47,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344349125] [2021-05-03 15:11:47,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:47,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:11:47,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:47,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:47,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:47,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:47,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:47,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:47,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:47,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:47,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:47,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:47,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:11:47,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923504269] [2021-05-03 15:11:47,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:47,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:47,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:47,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:47,575 INFO L87 Difference]: Start difference. First operand 2239 states and 9557 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:48,247 INFO L93 Difference]: Finished difference Result 3037 states and 12562 transitions. [2021-05-03 15:11:48,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:11:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:48,255 INFO L225 Difference]: With dead ends: 3037 [2021-05-03 15:11:48,255 INFO L226 Difference]: Without dead ends: 3006 [2021-05-03 15:11:48,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 651.2ms TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:11:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-05-03 15:11:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 2147. [2021-05-03 15:11:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 4.27027027027027) internal successors, (9164), 2146 states have internal predecessors, (9164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 9164 transitions. [2021-05-03 15:11:48,294 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 9164 transitions. Word has length 29 [2021-05-03 15:11:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:48,294 INFO L480 AbstractCegarLoop]: Abstraction has 2147 states and 9164 transitions. [2021-05-03 15:11:48,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 9164 transitions. [2021-05-03 15:11:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:48,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:48,298 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:48,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:48,499 INFO L428 AbstractCegarLoop]: === Iteration 83 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:48,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:48,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2106272904, now seen corresponding path program 7 times [2021-05-03 15:11:48,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:48,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702430306] [2021-05-03 15:11:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:48,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702430306] [2021-05-03 15:11:48,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399745935] [2021-05-03 15:11:48,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:48,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:48,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:48,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:48,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:48,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:11:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:48,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:48,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:11:48,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992419820] [2021-05-03 15:11:48,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:11:48,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:48,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:11:48,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:11:48,822 INFO L87 Difference]: Start difference. First operand 2147 states and 9164 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:49,126 INFO L93 Difference]: Finished difference Result 2265 states and 9566 transitions. [2021-05-03 15:11:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:11:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:49,132 INFO L225 Difference]: With dead ends: 2265 [2021-05-03 15:11:49,132 INFO L226 Difference]: Without dead ends: 2250 [2021-05-03 15:11:49,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 304.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 15:11:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2021-05-03 15:11:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2123. [2021-05-03 15:11:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 4.27191328934967) internal successors, (9065), 2122 states have internal predecessors, (9065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 9065 transitions. [2021-05-03 15:11:49,164 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 9065 transitions. Word has length 29 [2021-05-03 15:11:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:49,164 INFO L480 AbstractCegarLoop]: Abstraction has 2123 states and 9065 transitions. [2021-05-03 15:11:49,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 9065 transitions. [2021-05-03 15:11:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:49,168 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:49,168 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:49,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:49,369 INFO L428 AbstractCegarLoop]: === Iteration 84 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash 382055414, now seen corresponding path program 8 times [2021-05-03 15:11:49,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:49,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664581905] [2021-05-03 15:11:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:49,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664581905] [2021-05-03 15:11:49,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146083329] [2021-05-03 15:11:49,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:49,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:49,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:49,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:49,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:49,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:49,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:49,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:49,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:49,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:49,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:49,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:49,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:11:49,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720551422] [2021-05-03 15:11:49,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:49,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:49,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:49,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:49,862 INFO L87 Difference]: Start difference. First operand 2123 states and 9065 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:50,753 INFO L93 Difference]: Finished difference Result 3347 states and 13768 transitions. [2021-05-03 15:11:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 15:11:50,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:50,761 INFO L225 Difference]: With dead ends: 3347 [2021-05-03 15:11:50,761 INFO L226 Difference]: Without dead ends: 3328 [2021-05-03 15:11:50,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 878.2ms TimeCoverageRelationStatistics Valid=320, Invalid=1162, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:11:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-05-03 15:11:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2245. [2021-05-03 15:11:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 4.270944741532976) internal successors, (9584), 2244 states have internal predecessors, (9584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 9584 transitions. [2021-05-03 15:11:50,803 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 9584 transitions. Word has length 29 [2021-05-03 15:11:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:50,803 INFO L480 AbstractCegarLoop]: Abstraction has 2245 states and 9584 transitions. [2021-05-03 15:11:50,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 9584 transitions. [2021-05-03 15:11:50,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:50,807 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:50,807 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:51,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:51,007 INFO L428 AbstractCegarLoop]: === Iteration 85 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:51,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:51,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1804410240, now seen corresponding path program 9 times [2021-05-03 15:11:51,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:51,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985736951] [2021-05-03 15:11:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:51,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985736951] [2021-05-03 15:11:51,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086619984] [2021-05-03 15:11:51,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:51,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:11:51,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:51,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:51,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:51,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:51,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:51,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:51,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:51,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:51,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:51,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:51,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:11:51,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824265317] [2021-05-03 15:11:51,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:11:51,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:51,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:11:51,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:51,413 INFO L87 Difference]: Start difference. First operand 2245 states and 9584 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:51,995 INFO L93 Difference]: Finished difference Result 3059 states and 12668 transitions. [2021-05-03 15:11:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:11:51,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:52,002 INFO L225 Difference]: With dead ends: 3059 [2021-05-03 15:11:52,002 INFO L226 Difference]: Without dead ends: 3028 [2021-05-03 15:11:52,002 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 587.2ms TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-05-03 15:11:52,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-05-03 15:11:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2153. [2021-05-03 15:11:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 4.270910780669145) internal successors, (9191), 2152 states have internal predecessors, (9191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 9191 transitions. [2021-05-03 15:11:52,043 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 9191 transitions. Word has length 29 [2021-05-03 15:11:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:52,043 INFO L480 AbstractCegarLoop]: Abstraction has 2153 states and 9191 transitions. [2021-05-03 15:11:52,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:52,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 9191 transitions. [2021-05-03 15:11:52,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:52,047 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:52,047 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:52,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:52,248 INFO L428 AbstractCegarLoop]: === Iteration 86 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash 794590770, now seen corresponding path program 10 times [2021-05-03 15:11:52,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:52,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99199484] [2021-05-03 15:11:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:52,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99199484] [2021-05-03 15:11:52,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071377507] [2021-05-03 15:11:52,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:52,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:52,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:52,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:52,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:52,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:52,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:52,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:52,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:52,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:11:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:52,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:52,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-03 15:11:52,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655705869] [2021-05-03 15:11:52,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:11:52,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:52,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:11:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:52,562 INFO L87 Difference]: Start difference. First operand 2153 states and 9191 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:52,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:52,828 INFO L93 Difference]: Finished difference Result 2297 states and 9681 transitions. [2021-05-03 15:11:52,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:11:52,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:52,834 INFO L225 Difference]: With dead ends: 2297 [2021-05-03 15:11:52,834 INFO L226 Difference]: Without dead ends: 2278 [2021-05-03 15:11:52,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-05-03 15:11:52,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2123. [2021-05-03 15:11:52,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 4.27191328934967) internal successors, (9065), 2122 states have internal predecessors, (9065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 9065 transitions. [2021-05-03 15:11:52,869 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 9065 transitions. Word has length 29 [2021-05-03 15:11:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:52,869 INFO L480 AbstractCegarLoop]: Abstraction has 2123 states and 9065 transitions. [2021-05-03 15:11:52,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 9065 transitions. [2021-05-03 15:11:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:52,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:52,873 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:53,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-03 15:11:53,074 INFO L428 AbstractCegarLoop]: === Iteration 87 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:53,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1672937528, now seen corresponding path program 18 times [2021-05-03 15:11:53,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:53,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953655987] [2021-05-03 15:11:53,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:53,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953655987] [2021-05-03 15:11:53,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313971058] [2021-05-03 15:11:53,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:53,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:11:53,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:53,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:53,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:53,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:53,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:53,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:53,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:53,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:53,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:11:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:53,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:53,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:11:53,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610946730] [2021-05-03 15:11:53,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:53,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:53,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:53,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:53,397 INFO L87 Difference]: Start difference. First operand 2123 states and 9065 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:53,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:53,946 INFO L93 Difference]: Finished difference Result 2669 states and 11188 transitions. [2021-05-03 15:11:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:11:53,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:53,953 INFO L225 Difference]: With dead ends: 2669 [2021-05-03 15:11:53,953 INFO L226 Difference]: Without dead ends: 2650 [2021-05-03 15:11:53,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:11:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-05-03 15:11:53,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2231. [2021-05-03 15:11:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2231 states, 2230 states have (on average 4.279372197309417) internal successors, (9543), 2230 states have internal predecessors, (9543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2231 states to 2231 states and 9543 transitions. [2021-05-03 15:11:53,992 INFO L78 Accepts]: Start accepts. Automaton has 2231 states and 9543 transitions. Word has length 29 [2021-05-03 15:11:53,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:53,992 INFO L480 AbstractCegarLoop]: Abstraction has 2231 states and 9543 transitions. [2021-05-03 15:11:53,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2231 states and 9543 transitions. [2021-05-03 15:11:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:53,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:53,996 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:54,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-03 15:11:54,197 INFO L428 AbstractCegarLoop]: === Iteration 88 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:54,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:54,197 INFO L82 PathProgramCache]: Analyzing trace with hash -369664922, now seen corresponding path program 19 times [2021-05-03 15:11:54,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:54,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616777672] [2021-05-03 15:11:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:54,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616777672] [2021-05-03 15:11:54,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241022842] [2021-05-03 15:11:54,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:54,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:11:54,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:54,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:54,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:54,382 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:54,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:54,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-05-03 15:11:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:54,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:54,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-05-03 15:11:54,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843247786] [2021-05-03 15:11:54,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:54,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:54,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:54,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:54,499 INFO L87 Difference]: Start difference. First operand 2231 states and 9543 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:54,809 INFO L93 Difference]: Finished difference Result 2620 states and 10907 transitions. [2021-05-03 15:11:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 15:11:54,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:54,816 INFO L225 Difference]: With dead ends: 2620 [2021-05-03 15:11:54,816 INFO L226 Difference]: Without dead ends: 2546 [2021-05-03 15:11:54,816 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:11:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-05-03 15:11:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 2206. [2021-05-03 15:11:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.2811791383219955) internal successors, (9440), 2205 states have internal predecessors, (9440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9440 transitions. [2021-05-03 15:11:54,853 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9440 transitions. Word has length 29 [2021-05-03 15:11:54,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:54,853 INFO L480 AbstractCegarLoop]: Abstraction has 2206 states and 9440 transitions. [2021-05-03 15:11:54,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9440 transitions. [2021-05-03 15:11:54,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:54,857 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:54,857 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:55,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:55,058 INFO L428 AbstractCegarLoop]: === Iteration 89 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:55,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2129141234, now seen corresponding path program 20 times [2021-05-03 15:11:55,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:55,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511668341] [2021-05-03 15:11:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:55,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:55,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511668341] [2021-05-03 15:11:55,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876620242] [2021-05-03 15:11:55,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:55,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:11:55,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:55,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:55,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:55,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:55,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:55,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:55,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-05-03 15:11:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:55,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:55,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:11:55,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307580341] [2021-05-03 15:11:55,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:55,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:55,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:55,420 INFO L87 Difference]: Start difference. First operand 2206 states and 9440 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:56,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:56,125 INFO L93 Difference]: Finished difference Result 2365 states and 9967 transitions. [2021-05-03 15:11:56,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 15:11:56,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:56,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:56,132 INFO L225 Difference]: With dead ends: 2365 [2021-05-03 15:11:56,132 INFO L226 Difference]: Without dead ends: 2350 [2021-05-03 15:11:56,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 516.7ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:11:56,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2021-05-03 15:11:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2203. [2021-05-03 15:11:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 4.2829246139872845) internal successors, (9431), 2202 states have internal predecessors, (9431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 9431 transitions. [2021-05-03 15:11:56,172 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 9431 transitions. Word has length 29 [2021-05-03 15:11:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:56,172 INFO L480 AbstractCegarLoop]: Abstraction has 2203 states and 9431 transitions. [2021-05-03 15:11:56,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 9431 transitions. [2021-05-03 15:11:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:56,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:56,176 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:56,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:56,377 INFO L428 AbstractCegarLoop]: === Iteration 90 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:56,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:56,377 INFO L82 PathProgramCache]: Analyzing trace with hash -433376052, now seen corresponding path program 21 times [2021-05-03 15:11:56,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:56,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967651656] [2021-05-03 15:11:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:56,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967651656] [2021-05-03 15:11:56,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892695071] [2021-05-03 15:11:56,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:56,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:11:56,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:56,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:11:56,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:56,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:56,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:11:56,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:56,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:56,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:56,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:11:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:56,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:56,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-05-03 15:11:56,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193212968] [2021-05-03 15:11:56,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:11:56,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:56,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:11:56,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:56,679 INFO L87 Difference]: Start difference. First operand 2203 states and 9431 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:57,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:57,280 INFO L93 Difference]: Finished difference Result 3072 states and 12771 transitions. [2021-05-03 15:11:57,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 15:11:57,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:57,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:57,288 INFO L225 Difference]: With dead ends: 3072 [2021-05-03 15:11:57,288 INFO L226 Difference]: Without dead ends: 3053 [2021-05-03 15:11:57,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2021-05-03 15:11:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3053 states. [2021-05-03 15:11:57,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3053 to 2305. [2021-05-03 15:11:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2305 states, 2304 states have (on average 4.294270833333333) internal successors, (9894), 2304 states have internal predecessors, (9894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:57,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2305 states to 2305 states and 9894 transitions. [2021-05-03 15:11:57,334 INFO L78 Accepts]: Start accepts. Automaton has 2305 states and 9894 transitions. Word has length 29 [2021-05-03 15:11:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:57,334 INFO L480 AbstractCegarLoop]: Abstraction has 2305 states and 9894 transitions. [2021-05-03 15:11:57,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2305 states and 9894 transitions. [2021-05-03 15:11:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:57,338 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:57,338 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:57,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:57,539 INFO L428 AbstractCegarLoop]: === Iteration 91 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash 869896554, now seen corresponding path program 22 times [2021-05-03 15:11:57,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:57,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652686708] [2021-05-03 15:11:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652686708] [2021-05-03 15:11:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096039276] [2021-05-03 15:11:57,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:57,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:11:57,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:57,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:11:57,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:57,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:57,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:57,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:57,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:57,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-05-03 15:11:57,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:57,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:57,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-05-03 15:11:57,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277042920] [2021-05-03 15:11:57,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:11:57,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:11:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:11:57,859 INFO L87 Difference]: Start difference. First operand 2305 states and 9894 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:58,242 INFO L93 Difference]: Finished difference Result 2686 states and 11258 transitions. [2021-05-03 15:11:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:11:58,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:58,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:58,249 INFO L225 Difference]: With dead ends: 2686 [2021-05-03 15:11:58,249 INFO L226 Difference]: Without dead ends: 2618 [2021-05-03 15:11:58,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:11:58,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-05-03 15:11:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2233. [2021-05-03 15:11:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 4.286290322580645) internal successors, (9567), 2232 states have internal predecessors, (9567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 9567 transitions. [2021-05-03 15:11:58,286 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 9567 transitions. Word has length 29 [2021-05-03 15:11:58,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:58,286 INFO L480 AbstractCegarLoop]: Abstraction has 2233 states and 9567 transitions. [2021-05-03 15:11:58,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 9567 transitions. [2021-05-03 15:11:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:58,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:58,290 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:58,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:58,491 INFO L428 AbstractCegarLoop]: === Iteration 92 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash 279969416, now seen corresponding path program 23 times [2021-05-03 15:11:58,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:58,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132870282] [2021-05-03 15:11:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:58,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132870282] [2021-05-03 15:11:58,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629696041] [2021-05-03 15:11:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:58,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:11:58,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:58,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:11:58,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:11:58,691 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:58,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:58,692 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:11:58,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:58,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:58,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 15:11:58,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573781444] [2021-05-03 15:11:58,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:11:58,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:11:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:11:58,737 INFO L87 Difference]: Start difference. First operand 2233 states and 9567 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:11:58,917 INFO L93 Difference]: Finished difference Result 2346 states and 9953 transitions. [2021-05-03 15:11:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:11:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:11:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:11:58,923 INFO L225 Difference]: With dead ends: 2346 [2021-05-03 15:11:58,923 INFO L226 Difference]: Without dead ends: 2327 [2021-05-03 15:11:58,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:11:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2021-05-03 15:11:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2230. [2021-05-03 15:11:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 4.287572902646927) internal successors, (9557), 2229 states have internal predecessors, (9557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 9557 transitions. [2021-05-03 15:11:58,955 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 9557 transitions. Word has length 29 [2021-05-03 15:11:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:11:58,955 INFO L480 AbstractCegarLoop]: Abstraction has 2230 states and 9557 transitions. [2021-05-03 15:11:58,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:11:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 9557 transitions. [2021-05-03 15:11:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:11:58,958 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:11:58,959 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:11:59,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:59,159 INFO L428 AbstractCegarLoop]: === Iteration 93 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:11:59,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:11:59,159 INFO L82 PathProgramCache]: Analyzing trace with hash 25278284, now seen corresponding path program 24 times [2021-05-03 15:11:59,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:11:59,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245341878] [2021-05-03 15:11:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:11:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:11:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:59,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245341878] [2021-05-03 15:11:59,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672311575] [2021-05-03 15:11:59,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:11:59,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:11:59,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:11:59,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:11:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:11:59,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:59,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:11:59,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:11:59,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:11:59,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:11:59,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-05-03 15:11:59,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:11:59,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:11:59,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-05-03 15:11:59,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90709123] [2021-05-03 15:11:59,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:11:59,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:11:59,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:11:59,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:11:59,477 INFO L87 Difference]: Start difference. First operand 2230 states and 9557 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:00,004 INFO L93 Difference]: Finished difference Result 2826 states and 11863 transitions. [2021-05-03 15:12:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:12:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:00,011 INFO L225 Difference]: With dead ends: 2826 [2021-05-03 15:12:00,011 INFO L226 Difference]: Without dead ends: 2807 [2021-05-03 15:12:00,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2021-05-03 15:12:00,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 2337. [2021-05-03 15:12:00,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 4.290667808219178) internal successors, (10023), 2336 states have internal predecessors, (10023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 10023 transitions. [2021-05-03 15:12:00,047 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 10023 transitions. Word has length 29 [2021-05-03 15:12:00,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:00,047 INFO L480 AbstractCegarLoop]: Abstraction has 2337 states and 10023 transitions. [2021-05-03 15:12:00,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 10023 transitions. [2021-05-03 15:12:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:00,050 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:00,050 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:00,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:00,251 INFO L428 AbstractCegarLoop]: === Iteration 94 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:00,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1328550890, now seen corresponding path program 25 times [2021-05-03 15:12:00,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:00,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392208306] [2021-05-03 15:12:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:00,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392208306] [2021-05-03 15:12:00,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372727570] [2021-05-03 15:12:00,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:00,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 15:12:00,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:00,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-05-03 15:12:00,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:00,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:00,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:00,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:24 [2021-05-03 15:12:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:00,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:00,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-05-03 15:12:00,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160056911] [2021-05-03 15:12:00,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 15:12:00,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:00,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 15:12:00,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:12:00,533 INFO L87 Difference]: Start difference. First operand 2337 states and 10023 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:00,968 INFO L93 Difference]: Finished difference Result 2736 states and 11401 transitions. [2021-05-03 15:12:00,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:12:00,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:00,975 INFO L225 Difference]: With dead ends: 2736 [2021-05-03 15:12:00,975 INFO L226 Difference]: Without dead ends: 2662 [2021-05-03 15:12:00,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:12:00,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-05-03 15:12:01,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 2265. [2021-05-03 15:12:01,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 4.282685512367491) internal successors, (9696), 2264 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:01,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 9696 transitions. [2021-05-03 15:12:01,013 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 9696 transitions. Word has length 29 [2021-05-03 15:12:01,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:01,014 INFO L480 AbstractCegarLoop]: Abstraction has 2265 states and 9696 transitions. [2021-05-03 15:12:01,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:01,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 9696 transitions. [2021-05-03 15:12:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:01,017 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:01,017 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:01,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:01,218 INFO L428 AbstractCegarLoop]: === Iteration 95 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:01,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:01,218 INFO L82 PathProgramCache]: Analyzing trace with hash -430925422, now seen corresponding path program 26 times [2021-05-03 15:12:01,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:01,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749651934] [2021-05-03 15:12:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:01,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:01,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749651934] [2021-05-03 15:12:01,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174585920] [2021-05-03 15:12:01,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:01,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:01,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:12:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:01,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-05-03 15:12:01,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:01,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:01,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:01,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-05-03 15:12:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:01,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:01,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-03 15:12:01,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38670388] [2021-05-03 15:12:01,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 15:12:01,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:01,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 15:12:01,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:12:01,506 INFO L87 Difference]: Start difference. First operand 2265 states and 9696 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:01,818 INFO L93 Difference]: Finished difference Result 2444 states and 10315 transitions. [2021-05-03 15:12:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 15:12:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:01,824 INFO L225 Difference]: With dead ends: 2444 [2021-05-03 15:12:01,824 INFO L226 Difference]: Without dead ends: 2429 [2021-05-03 15:12:01,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:12:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-05-03 15:12:01,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 2241. [2021-05-03 15:12:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 4.283035714285714) internal successors, (9594), 2240 states have internal predecessors, (9594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 9594 transitions. [2021-05-03 15:12:01,859 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 9594 transitions. Word has length 29 [2021-05-03 15:12:01,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:01,859 INFO L480 AbstractCegarLoop]: Abstraction has 2241 states and 9594 transitions. [2021-05-03 15:12:01,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:01,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 9594 transitions. [2021-05-03 15:12:01,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:01,862 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:01,862 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:02,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-03 15:12:02,071 INFO L428 AbstractCegarLoop]: === Iteration 96 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:02,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:02,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1138592478, now seen corresponding path program 27 times [2021-05-03 15:12:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:02,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165304153] [2021-05-03 15:12:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:02,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165304153] [2021-05-03 15:12:02,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961438076] [2021-05-03 15:12:02,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:02,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:12:02,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:02,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:12:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:02,340 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:02,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-05-03 15:12:02,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:02,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:02,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:02,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:16 [2021-05-03 15:12:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:02,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:02,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:12:02,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257667951] [2021-05-03 15:12:02,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:12:02,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:02,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:12:02,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:12:02,429 INFO L87 Difference]: Start difference. First operand 2241 states and 9594 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:03,189 INFO L93 Difference]: Finished difference Result 2545 states and 10688 transitions. [2021-05-03 15:12:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:12:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:03,194 INFO L225 Difference]: With dead ends: 2545 [2021-05-03 15:12:03,194 INFO L226 Difference]: Without dead ends: 2530 [2021-05-03 15:12:03,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:12:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-05-03 15:12:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2249. [2021-05-03 15:12:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 4.277580071174377) internal successors, (9616), 2248 states have internal predecessors, (9616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:03,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 9616 transitions. [2021-05-03 15:12:03,223 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 9616 transitions. Word has length 29 [2021-05-03 15:12:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:03,223 INFO L480 AbstractCegarLoop]: Abstraction has 2249 states and 9616 transitions. [2021-05-03 15:12:03,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 9616 transitions. [2021-05-03 15:12:03,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:03,226 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:03,226 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:03,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:03,427 INFO L428 AbstractCegarLoop]: === Iteration 97 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:03,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:03,427 INFO L82 PathProgramCache]: Analyzing trace with hash -324196480, now seen corresponding path program 11 times [2021-05-03 15:12:03,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:03,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30562959] [2021-05-03 15:12:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:03,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30562959] [2021-05-03 15:12:03,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418784441] [2021-05-03 15:12:03,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:03,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:03,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 15:12:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:03,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-05-03 15:12:03,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:03,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:03,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:03,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-05-03 15:12:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:03,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:03,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-05-03 15:12:03,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863834717] [2021-05-03 15:12:03,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 15:12:03,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:03,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 15:12:03,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:12:03,853 INFO L87 Difference]: Start difference. First operand 2249 states and 9616 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:04,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:04,309 INFO L93 Difference]: Finished difference Result 3020 states and 12650 transitions. [2021-05-03 15:12:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 15:12:04,310 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:04,317 INFO L225 Difference]: With dead ends: 3020 [2021-05-03 15:12:04,317 INFO L226 Difference]: Without dead ends: 3001 [2021-05-03 15:12:04,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 419.3ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-05-03 15:12:04,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-05-03 15:12:04,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2384. [2021-05-03 15:12:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 4.277801091061687) internal successors, (10194), 2383 states have internal predecessors, (10194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 10194 transitions. [2021-05-03 15:12:04,357 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 10194 transitions. Word has length 29 [2021-05-03 15:12:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:04,357 INFO L480 AbstractCegarLoop]: Abstraction has 2384 states and 10194 transitions. [2021-05-03 15:12:04,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:04,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 10194 transitions. [2021-05-03 15:12:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:04,361 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:04,361 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:04,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 15:12:04,561 INFO L428 AbstractCegarLoop]: === Iteration 98 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1098158346, now seen corresponding path program 12 times [2021-05-03 15:12:04,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:04,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516460500] [2021-05-03 15:12:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:04,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516460500] [2021-05-03 15:12:04,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312698145] [2021-05-03 15:12:04,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:04,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:12:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:04,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:12:04,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:04,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:04,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:12:04,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:04,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:04,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:04,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-05-03 15:12:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:04,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:04,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:12:04,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596842949] [2021-05-03 15:12:04,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:12:04,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:04,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:12:04,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:12:04,931 INFO L87 Difference]: Start difference. First operand 2384 states and 10194 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:05,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:05,720 INFO L93 Difference]: Finished difference Result 3285 states and 13630 transitions. [2021-05-03 15:12:05,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 15:12:05,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:05,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:05,728 INFO L225 Difference]: With dead ends: 3285 [2021-05-03 15:12:05,728 INFO L226 Difference]: Without dead ends: 3254 [2021-05-03 15:12:05,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 15:12:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2021-05-03 15:12:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 2304. [2021-05-03 15:12:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 4.272253582283978) internal successors, (9839), 2303 states have internal predecessors, (9839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:05,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 9839 transitions. [2021-05-03 15:12:05,769 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 9839 transitions. Word has length 29 [2021-05-03 15:12:05,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:05,769 INFO L480 AbstractCegarLoop]: Abstraction has 2304 states and 9839 transitions. [2021-05-03 15:12:05,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 9839 transitions. [2021-05-03 15:12:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:05,772 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:05,772 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:05,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:05,973 INFO L428 AbstractCegarLoop]: === Iteration 99 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1564614906, now seen corresponding path program 13 times [2021-05-03 15:12:05,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:05,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828814074] [2021-05-03 15:12:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:06,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828814074] [2021-05-03 15:12:06,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686193245] [2021-05-03 15:12:06,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:06,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:12:06,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:06,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:12:06,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-05-03 15:12:06,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:06,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:06,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:06,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-05-03 15:12:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:06,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:06,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:12:06,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133080562] [2021-05-03 15:12:06,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:12:06,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:06,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:12:06,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:12:06,286 INFO L87 Difference]: Start difference. First operand 2304 states and 9839 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:06,598 INFO L93 Difference]: Finished difference Result 2466 states and 10391 transitions. [2021-05-03 15:12:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:12:06,599 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:06,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:06,604 INFO L225 Difference]: With dead ends: 2466 [2021-05-03 15:12:06,604 INFO L226 Difference]: Without dead ends: 2451 [2021-05-03 15:12:06,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:12:06,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-05-03 15:12:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2301. [2021-05-03 15:12:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 4.273913043478261) internal successors, (9830), 2300 states have internal predecessors, (9830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:06,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 9830 transitions. [2021-05-03 15:12:06,637 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 9830 transitions. Word has length 29 [2021-05-03 15:12:06,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:06,637 INFO L480 AbstractCegarLoop]: Abstraction has 2301 states and 9830 transitions. [2021-05-03 15:12:06,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:06,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 9830 transitions. [2021-05-03 15:12:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:06,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:06,641 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:06,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 15:12:06,841 INFO L428 AbstractCegarLoop]: === Iteration 100 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:06,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:06,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1817023806, now seen corresponding path program 14 times [2021-05-03 15:12:06,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:06,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805389772] [2021-05-03 15:12:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:06,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805389772] [2021-05-03 15:12:06,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944722318] [2021-05-03 15:12:06,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:06,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:06,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:06,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:12:06,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:07,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:07,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-05-03 15:12:07,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:07,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:07,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:07,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:16 [2021-05-03 15:12:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:07,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:07,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:12:07,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681325507] [2021-05-03 15:12:07,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:12:07,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:07,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:12:07,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:12:07,188 INFO L87 Difference]: Start difference. First operand 2301 states and 9830 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:08,022 INFO L93 Difference]: Finished difference Result 2666 states and 11187 transitions. [2021-05-03 15:12:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:12:08,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:08,029 INFO L225 Difference]: With dead ends: 2666 [2021-05-03 15:12:08,029 INFO L226 Difference]: Without dead ends: 2651 [2021-05-03 15:12:08,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 682.3ms TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-05-03 15:12:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-05-03 15:12:08,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2291. [2021-05-03 15:12:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 4.278602620087336) internal successors, (9798), 2290 states have internal predecessors, (9798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 9798 transitions. [2021-05-03 15:12:08,066 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 9798 transitions. Word has length 29 [2021-05-03 15:12:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:08,066 INFO L480 AbstractCegarLoop]: Abstraction has 2291 states and 9798 transitions. [2021-05-03 15:12:08,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 9798 transitions. [2021-05-03 15:12:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:08,069 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:08,069 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:08,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 15:12:08,270 INFO L428 AbstractCegarLoop]: === Iteration 101 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:08,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:08,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1349518276, now seen corresponding path program 15 times [2021-05-03 15:12:08,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:08,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720290632] [2021-05-03 15:12:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720290632] [2021-05-03 15:12:08,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010419430] [2021-05-03 15:12:08,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:08,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 15:12:08,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:08,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:12:08,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:08,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:08,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:12:08,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:08,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:08,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:08,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:12:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:08,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:08,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:12:08,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405882270] [2021-05-03 15:12:08,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:12:08,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:08,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:12:08,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:12:08,654 INFO L87 Difference]: Start difference. First operand 2291 states and 9798 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:09,823 INFO L93 Difference]: Finished difference Result 3654 states and 15084 transitions. [2021-05-03 15:12:09,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:12:09,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:09,831 INFO L225 Difference]: With dead ends: 3654 [2021-05-03 15:12:09,831 INFO L226 Difference]: Without dead ends: 3635 [2021-05-03 15:12:09,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 937.1ms TimeCoverageRelationStatistics Valid=366, Invalid=1526, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 15:12:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3635 states. [2021-05-03 15:12:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3635 to 2422. [2021-05-03 15:12:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2421 states have (on average 4.283767038413878) internal successors, (10371), 2421 states have internal predecessors, (10371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 10371 transitions. [2021-05-03 15:12:09,876 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 10371 transitions. Word has length 29 [2021-05-03 15:12:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:09,876 INFO L480 AbstractCegarLoop]: Abstraction has 2422 states and 10371 transitions. [2021-05-03 15:12:09,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 10371 transitions. [2021-05-03 15:12:09,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:09,880 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:09,880 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:10,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 15:12:10,081 INFO L428 AbstractCegarLoop]: === Iteration 102 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:10,081 INFO L82 PathProgramCache]: Analyzing trace with hash 72836550, now seen corresponding path program 16 times [2021-05-03 15:12:10,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:10,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380660543] [2021-05-03 15:12:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:10,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380660543] [2021-05-03 15:12:10,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827942042] [2021-05-03 15:12:10,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:10,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:10,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:10,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:12:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 15:12:10,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-05-03 15:12:10,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:10,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:10,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:10,355 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-05-03 15:12:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:10,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:10,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 15:12:10,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716493291] [2021-05-03 15:12:10,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:12:10,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:10,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:12:10,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:12:10,440 INFO L87 Difference]: Start difference. First operand 2422 states and 10371 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:10,757 INFO L93 Difference]: Finished difference Result 2830 states and 11871 transitions. [2021-05-03 15:12:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:12:10,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:10,763 INFO L225 Difference]: With dead ends: 2830 [2021-05-03 15:12:10,763 INFO L226 Difference]: Without dead ends: 2799 [2021-05-03 15:12:10,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:12:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-05-03 15:12:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2330. [2021-05-03 15:12:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 4.276513525118077) internal successors, (9960), 2329 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:10,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9960 transitions. [2021-05-03 15:12:10,801 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9960 transitions. Word has length 29 [2021-05-03 15:12:10,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:10,801 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 9960 transitions. [2021-05-03 15:12:10,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:10,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9960 transitions. [2021-05-03 15:12:10,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:10,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:10,804 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:11,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:11,005 INFO L428 AbstractCegarLoop]: === Iteration 103 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1705030594, now seen corresponding path program 17 times [2021-05-03 15:12:11,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:11,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195284931] [2021-05-03 15:12:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:11,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195284931] [2021-05-03 15:12:11,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776698411] [2021-05-03 15:12:11,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:11,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:11,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:11,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:12:11,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:11,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:12:11,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:11,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:11,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:11,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:12:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:11,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:11,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-03 15:12:11,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129022634] [2021-05-03 15:12:11,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 15:12:11,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:11,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 15:12:11,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 15:12:11,416 INFO L87 Difference]: Start difference. First operand 2330 states and 9960 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:11,782 INFO L93 Difference]: Finished difference Result 2431 states and 10293 transitions. [2021-05-03 15:12:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 15:12:11,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:11,787 INFO L225 Difference]: With dead ends: 2431 [2021-05-03 15:12:11,787 INFO L226 Difference]: Without dead ends: 2416 [2021-05-03 15:12:11,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:12:11,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-05-03 15:12:11,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2300. [2021-05-03 15:12:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 4.277511961722488) internal successors, (9834), 2299 states have internal predecessors, (9834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 9834 transitions. [2021-05-03 15:12:11,820 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 9834 transitions. Word has length 29 [2021-05-03 15:12:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:11,820 INFO L480 AbstractCegarLoop]: Abstraction has 2300 states and 9834 transitions. [2021-05-03 15:12:11,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 9834 transitions. [2021-05-03 15:12:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:11,824 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:11,824 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:12,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-03 15:12:12,024 INFO L428 AbstractCegarLoop]: === Iteration 104 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:12,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:12,024 INFO L82 PathProgramCache]: Analyzing trace with hash -101608384, now seen corresponding path program 18 times [2021-05-03 15:12:12,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:12,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118796109] [2021-05-03 15:12:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:12,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118796109] [2021-05-03 15:12:12,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569977912] [2021-05-03 15:12:12,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:12,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 15:12:12,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 15:12:12,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:12,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:12,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-05-03 15:12:12,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:12,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:12,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:12,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-05-03 15:12:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:12,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:12,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-05-03 15:12:12,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569852863] [2021-05-03 15:12:12,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 15:12:12,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:12,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 15:12:12,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-03 15:12:12,445 INFO L87 Difference]: Start difference. First operand 2300 states and 9834 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:13,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:13,541 INFO L93 Difference]: Finished difference Result 3689 states and 15122 transitions. [2021-05-03 15:12:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 15:12:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:13,549 INFO L225 Difference]: With dead ends: 3689 [2021-05-03 15:12:13,550 INFO L226 Difference]: Without dead ends: 3670 [2021-05-03 15:12:13,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 937.1ms TimeCoverageRelationStatistics Valid=331, Invalid=1309, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 15:12:13,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-05-03 15:12:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2422. [2021-05-03 15:12:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2421 states have (on average 4.283767038413878) internal successors, (10371), 2421 states have internal predecessors, (10371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 10371 transitions. [2021-05-03 15:12:13,595 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 10371 transitions. Word has length 29 [2021-05-03 15:12:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:13,595 INFO L480 AbstractCegarLoop]: Abstraction has 2422 states and 10371 transitions. [2021-05-03 15:12:13,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 10371 transitions. [2021-05-03 15:12:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:13,599 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:13,599 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:13,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:13,800 INFO L428 AbstractCegarLoop]: === Iteration 105 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:13,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1320746442, now seen corresponding path program 19 times [2021-05-03 15:12:13,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:13,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971231940] [2021-05-03 15:12:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:13,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971231940] [2021-05-03 15:12:13,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745327534] [2021-05-03 15:12:13,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:14,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-03 15:12:14,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:14,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 15:12:14,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:14,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:14,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:14,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-05-03 15:12:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:14,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:14,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-05-03 15:12:14,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022706182] [2021-05-03 15:12:14,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 15:12:14,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:14,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 15:12:14,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:12:14,142 INFO L87 Difference]: Start difference. First operand 2422 states and 10371 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:14,354 INFO L93 Difference]: Finished difference Result 2830 states and 11878 transitions. [2021-05-03 15:12:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 15:12:14,355 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:14,360 INFO L225 Difference]: With dead ends: 2830 [2021-05-03 15:12:14,360 INFO L226 Difference]: Without dead ends: 2799 [2021-05-03 15:12:14,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 15:12:14,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-05-03 15:12:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2330. [2021-05-03 15:12:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 4.276513525118077) internal successors, (9960), 2329 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:14,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9960 transitions. [2021-05-03 15:12:14,391 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9960 transitions. Word has length 29 [2021-05-03 15:12:14,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:14,392 INFO L480 AbstractCegarLoop]: Abstraction has 2330 states and 9960 transitions. [2021-05-03 15:12:14,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:14,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9960 transitions. [2021-05-03 15:12:14,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-03 15:12:14,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:14,395 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:14,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-03 15:12:14,596 INFO L428 AbstractCegarLoop]: === Iteration 106 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:14,596 INFO L82 PathProgramCache]: Analyzing trace with hash 310926972, now seen corresponding path program 20 times [2021-05-03 15:12:14,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:14,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098757257] [2021-05-03 15:12:14,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:14,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098757257] [2021-05-03 15:12:14,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584122539] [2021-05-03 15:12:14,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:14,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:14,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:14,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 15:12:14,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:14,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:14,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-05-03 15:12:14,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:14,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:14,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:14,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:28 [2021-05-03 15:12:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:15,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:15,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-03 15:12:15,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698569577] [2021-05-03 15:12:15,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 15:12:15,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:15,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 15:12:15,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-03 15:12:15,029 INFO L87 Difference]: Start difference. First operand 2330 states and 9960 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:15,815 INFO L93 Difference]: Finished difference Result 2685 states and 11276 transitions. [2021-05-03 15:12:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 15:12:15,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-05-03 15:12:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:15,821 INFO L225 Difference]: With dead ends: 2685 [2021-05-03 15:12:15,821 INFO L226 Difference]: Without dead ends: 2666 [2021-05-03 15:12:15,821 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 735.3ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-05-03 15:12:15,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-05-03 15:12:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2318. [2021-05-03 15:12:15,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 4.280535174794993) internal successors, (9918), 2317 states have internal predecessors, (9918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 9918 transitions. [2021-05-03 15:12:15,856 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 9918 transitions. Word has length 29 [2021-05-03 15:12:15,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:15,856 INFO L480 AbstractCegarLoop]: Abstraction has 2318 states and 9918 transitions. [2021-05-03 15:12:15,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 9918 transitions. [2021-05-03 15:12:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:12:15,860 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:15,860 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:16,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:16,062 INFO L428 AbstractCegarLoop]: === Iteration 107 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:16,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1155389859, now seen corresponding path program 31 times [2021-05-03 15:12:16,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:16,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827321312] [2021-05-03 15:12:16,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:16,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827321312] [2021-05-03 15:12:16,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292286857] [2021-05-03 15:12:16,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:16,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:16,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:16,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:16,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 15:12:16,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864501536] [2021-05-03 15:12:16,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:12:16,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:16,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:12:16,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:12:16,185 INFO L87 Difference]: Start difference. First operand 2318 states and 9918 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:16,266 INFO L93 Difference]: Finished difference Result 3746 states and 15568 transitions. [2021-05-03 15:12:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:12:16,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:12:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:16,274 INFO L225 Difference]: With dead ends: 3746 [2021-05-03 15:12:16,274 INFO L226 Difference]: Without dead ends: 3667 [2021-05-03 15:12:16,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:12:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2021-05-03 15:12:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3288. [2021-05-03 15:12:16,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 4.303620322482507) internal successors, (14146), 3287 states have internal predecessors, (14146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:16,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 14146 transitions. [2021-05-03 15:12:16,330 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 14146 transitions. Word has length 31 [2021-05-03 15:12:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:16,330 INFO L480 AbstractCegarLoop]: Abstraction has 3288 states and 14146 transitions. [2021-05-03 15:12:16,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 14146 transitions. [2021-05-03 15:12:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:12:16,336 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:16,336 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:16,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:16,549 INFO L428 AbstractCegarLoop]: === Iteration 108 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:16,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2104598493, now seen corresponding path program 32 times [2021-05-03 15:12:16,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:16,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117403597] [2021-05-03 15:12:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:16,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117403597] [2021-05-03 15:12:16,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065994510] [2021-05-03 15:12:16,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:16,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:16,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:16,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:12:16,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:16,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:16,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 15:12:16,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275884880] [2021-05-03 15:12:16,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:16,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:16,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:16,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:16,672 INFO L87 Difference]: Start difference. First operand 3288 states and 14146 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:16,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:16,774 INFO L93 Difference]: Finished difference Result 4860 states and 19940 transitions. [2021-05-03 15:12:16,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:12:16,774 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:12:16,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:16,784 INFO L225 Difference]: With dead ends: 4860 [2021-05-03 15:12:16,784 INFO L226 Difference]: Without dead ends: 4662 [2021-05-03 15:12:16,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-03 15:12:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2021-05-03 15:12:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 3707. [2021-05-03 15:12:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3707 states, 3706 states have (on average 4.268213707501349) internal successors, (15818), 3706 states have internal predecessors, (15818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:16,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3707 states to 3707 states and 15818 transitions. [2021-05-03 15:12:16,859 INFO L78 Accepts]: Start accepts. Automaton has 3707 states and 15818 transitions. Word has length 31 [2021-05-03 15:12:16,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:16,859 INFO L480 AbstractCegarLoop]: Abstraction has 3707 states and 15818 transitions. [2021-05-03 15:12:16,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:16,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3707 states and 15818 transitions. [2021-05-03 15:12:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:12:16,866 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:16,866 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:17,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-03 15:12:17,066 INFO L428 AbstractCegarLoop]: === Iteration 109 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -663936225, now seen corresponding path program 33 times [2021-05-03 15:12:17,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:17,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092197281] [2021-05-03 15:12:17,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:17,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:17,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092197281] [2021-05-03 15:12:17,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714131623] [2021-05-03 15:12:17,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:17,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:17,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:17,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:17,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:17,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-05-03 15:12:17,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072364473] [2021-05-03 15:12:17,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 15:12:17,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:17,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 15:12:17,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:12:17,250 INFO L87 Difference]: Start difference. First operand 3707 states and 15818 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:17,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:17,490 INFO L93 Difference]: Finished difference Result 5833 states and 23798 transitions. [2021-05-03 15:12:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 15:12:17,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:12:17,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:17,505 INFO L225 Difference]: With dead ends: 5833 [2021-05-03 15:12:17,505 INFO L226 Difference]: Without dead ends: 5514 [2021-05-03 15:12:17,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-05-03 15:12:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5514 states. [2021-05-03 15:12:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5514 to 4258. [2021-05-03 15:12:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4258 states, 4257 states have (on average 4.289405684754522) internal successors, (18260), 4257 states have internal predecessors, (18260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4258 states to 4258 states and 18260 transitions. [2021-05-03 15:12:17,704 INFO L78 Accepts]: Start accepts. Automaton has 4258 states and 18260 transitions. Word has length 31 [2021-05-03 15:12:17,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:17,704 INFO L480 AbstractCegarLoop]: Abstraction has 4258 states and 18260 transitions. [2021-05-03 15:12:17,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4258 states and 18260 transitions. [2021-05-03 15:12:17,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:12:17,713 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:17,714 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:17,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-03 15:12:17,937 INFO L428 AbstractCegarLoop]: === Iteration 110 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:17,937 INFO L82 PathProgramCache]: Analyzing trace with hash -750260253, now seen corresponding path program 34 times [2021-05-03 15:12:17,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:17,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186587651] [2021-05-03 15:12:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:17,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186587651] [2021-05-03 15:12:17,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510118523] [2021-05-03 15:12:17,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:17,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:17,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:17,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:17,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:18,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:18,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-05-03 15:12:18,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689961630] [2021-05-03 15:12:18,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:12:18,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:18,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:12:18,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:12:18,055 INFO L87 Difference]: Start difference. First operand 4258 states and 18260 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:18,156 INFO L93 Difference]: Finished difference Result 5097 states and 21273 transitions. [2021-05-03 15:12:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:12:18,157 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:12:18,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:18,169 INFO L225 Difference]: With dead ends: 5097 [2021-05-03 15:12:18,169 INFO L226 Difference]: Without dead ends: 5025 [2021-05-03 15:12:18,169 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2021-05-03 15:12:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4304. [2021-05-03 15:12:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 4303 states have (on average 4.256565187078782) internal successors, (18316), 4303 states have internal predecessors, (18316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 18316 transitions. [2021-05-03 15:12:18,249 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 18316 transitions. Word has length 31 [2021-05-03 15:12:18,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:18,249 INFO L480 AbstractCegarLoop]: Abstraction has 4304 states and 18316 transitions. [2021-05-03 15:12:18,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:18,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 18316 transitions. [2021-05-03 15:12:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:12:18,256 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:18,256 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:18,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:18,457 INFO L428 AbstractCegarLoop]: === Iteration 111 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:18,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:18,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1681107759, now seen corresponding path program 35 times [2021-05-03 15:12:18,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:18,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216655374] [2021-05-03 15:12:18,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:18,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216655374] [2021-05-03 15:12:18,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522587055] [2021-05-03 15:12:18,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:18,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:18,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:18,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:18,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:18,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:18,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-05-03 15:12:18,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557146058] [2021-05-03 15:12:18,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:12:18,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:18,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:12:18,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:12:18,577 INFO L87 Difference]: Start difference. First operand 4304 states and 18316 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:18,674 INFO L93 Difference]: Finished difference Result 6825 states and 28343 transitions. [2021-05-03 15:12:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:12:18,675 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:12:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:18,692 INFO L225 Difference]: With dead ends: 6825 [2021-05-03 15:12:18,693 INFO L226 Difference]: Without dead ends: 6786 [2021-05-03 15:12:18,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:18,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6786 states. [2021-05-03 15:12:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6786 to 5331. [2021-05-03 15:12:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5331 states, 5330 states have (on average 4.331144465290807) internal successors, (23085), 5330 states have internal predecessors, (23085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5331 states to 5331 states and 23085 transitions. [2021-05-03 15:12:18,800 INFO L78 Accepts]: Start accepts. Automaton has 5331 states and 23085 transitions. Word has length 31 [2021-05-03 15:12:18,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:18,800 INFO L480 AbstractCegarLoop]: Abstraction has 5331 states and 23085 transitions. [2021-05-03 15:12:18,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:18,800 INFO L276 IsEmpty]: Start isEmpty. Operand 5331 states and 23085 transitions. [2021-05-03 15:12:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:12:18,808 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:18,808 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:19,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-05-03 15:12:19,009 INFO L428 AbstractCegarLoop]: === Iteration 112 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:19,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:19,009 INFO L82 PathProgramCache]: Analyzing trace with hash 25855295, now seen corresponding path program 36 times [2021-05-03 15:12:19,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:19,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320077176] [2021-05-03 15:12:19,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:19,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320077176] [2021-05-03 15:12:19,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564575045] [2021-05-03 15:12:19,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:19,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:12:19,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:19,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:19,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:19,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:19,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-05-03 15:12:19,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345259015] [2021-05-03 15:12:19,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 15:12:19,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:19,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 15:12:19,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 15:12:19,119 INFO L87 Difference]: Start difference. First operand 5331 states and 23085 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:19,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:19,215 INFO L93 Difference]: Finished difference Result 7801 states and 31951 transitions. [2021-05-03 15:12:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 15:12:19,215 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:12:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:19,233 INFO L225 Difference]: With dead ends: 7801 [2021-05-03 15:12:19,233 INFO L226 Difference]: Without dead ends: 7657 [2021-05-03 15:12:19,233 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:12:19,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7657 states. [2021-05-03 15:12:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7657 to 5521. [2021-05-03 15:12:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5521 states, 5520 states have (on average 4.32536231884058) internal successors, (23876), 5520 states have internal predecessors, (23876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:19,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 23876 transitions. [2021-05-03 15:12:19,355 INFO L78 Accepts]: Start accepts. Automaton has 5521 states and 23876 transitions. Word has length 31 [2021-05-03 15:12:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:19,355 INFO L480 AbstractCegarLoop]: Abstraction has 5521 states and 23876 transitions. [2021-05-03 15:12:19,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5521 states and 23876 transitions. [2021-05-03 15:12:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:12:19,364 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:19,364 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:19,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:19,565 INFO L428 AbstractCegarLoop]: === Iteration 113 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:19,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1507309107, now seen corresponding path program 37 times [2021-05-03 15:12:19,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:19,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028512925] [2021-05-03 15:12:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:19,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028512925] [2021-05-03 15:12:19,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055332233] [2021-05-03 15:12:19,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:19,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 15:12:19,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:19,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:19,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-03 15:12:19,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903362938] [2021-05-03 15:12:19,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-03 15:12:19,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-03 15:12:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-03 15:12:19,673 INFO L87 Difference]: Start difference. First operand 5521 states and 23876 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:19,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:19,806 INFO L93 Difference]: Finished difference Result 6895 states and 28605 transitions. [2021-05-03 15:12:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 15:12:19,806 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:12:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:19,822 INFO L225 Difference]: With dead ends: 6895 [2021-05-03 15:12:19,822 INFO L226 Difference]: Without dead ends: 6817 [2021-05-03 15:12:19,823 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 15:12:19,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6817 states. [2021-05-03 15:12:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6817 to 5557. [2021-05-03 15:12:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5557 states, 5556 states have (on average 4.314074874010079) internal successors, (23969), 5556 states have internal predecessors, (23969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5557 states to 5557 states and 23969 transitions. [2021-05-03 15:12:19,932 INFO L78 Accepts]: Start accepts. Automaton has 5557 states and 23969 transitions. Word has length 31 [2021-05-03 15:12:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:19,932 INFO L480 AbstractCegarLoop]: Abstraction has 5557 states and 23969 transitions. [2021-05-03 15:12:19,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 5557 states and 23969 transitions. [2021-05-03 15:12:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:12:19,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:19,942 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:20,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-05-03 15:12:20,144 INFO L428 AbstractCegarLoop]: === Iteration 114 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:20,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:20,144 INFO L82 PathProgramCache]: Analyzing trace with hash -823782915, now seen corresponding path program 38 times [2021-05-03 15:12:20,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:20,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853731590] [2021-05-03 15:12:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:20,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853731590] [2021-05-03 15:12:20,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756865582] [2021-05-03 15:12:20,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:20,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:20,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:12:20,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:20,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:20,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 15:12:20,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306680256] [2021-05-03 15:12:20,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:20,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:20,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:20,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:20,301 INFO L87 Difference]: Start difference. First operand 5557 states and 23969 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:20,440 INFO L93 Difference]: Finished difference Result 8507 states and 35122 transitions. [2021-05-03 15:12:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 15:12:20,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:12:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:20,463 INFO L225 Difference]: With dead ends: 8507 [2021-05-03 15:12:20,463 INFO L226 Difference]: Without dead ends: 8450 [2021-05-03 15:12:20,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 15:12:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8450 states. [2021-05-03 15:12:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8450 to 6775. [2021-05-03 15:12:20,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6775 states, 6774 states have (on average 4.343666961913198) internal successors, (29424), 6774 states have internal predecessors, (29424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6775 states to 6775 states and 29424 transitions. [2021-05-03 15:12:20,627 INFO L78 Accepts]: Start accepts. Automaton has 6775 states and 29424 transitions. Word has length 31 [2021-05-03 15:12:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:20,627 INFO L480 AbstractCegarLoop]: Abstraction has 6775 states and 29424 transitions. [2021-05-03 15:12:20,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 6775 states and 29424 transitions. [2021-05-03 15:12:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-03 15:12:20,640 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:20,640 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:20,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:20,841 INFO L428 AbstractCegarLoop]: === Iteration 115 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:20,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:20,841 INFO L82 PathProgramCache]: Analyzing trace with hash -511510547, now seen corresponding path program 39 times [2021-05-03 15:12:20,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:20,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135444898] [2021-05-03 15:12:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135444898] [2021-05-03 15:12:20,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657609241] [2021-05-03 15:12:20,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:20,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-03 15:12:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:20,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:20,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-05-03 15:12:20,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009190430] [2021-05-03 15:12:20,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 15:12:20,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:20,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 15:12:20,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 15:12:20,984 INFO L87 Difference]: Start difference. First operand 6775 states and 29424 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:21,137 INFO L93 Difference]: Finished difference Result 7640 states and 31930 transitions. [2021-05-03 15:12:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 15:12:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-03 15:12:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:21,155 INFO L225 Difference]: With dead ends: 7640 [2021-05-03 15:12:21,155 INFO L226 Difference]: Without dead ends: 7505 [2021-05-03 15:12:21,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 15:12:21,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-05-03 15:12:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 5791. [2021-05-03 15:12:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5791 states, 5790 states have (on average 4.309326424870466) internal successors, (24951), 5790 states have internal predecessors, (24951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5791 states to 5791 states and 24951 transitions. [2021-05-03 15:12:21,283 INFO L78 Accepts]: Start accepts. Automaton has 5791 states and 24951 transitions. Word has length 31 [2021-05-03 15:12:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:21,283 INFO L480 AbstractCegarLoop]: Abstraction has 5791 states and 24951 transitions. [2021-05-03 15:12:21,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:21,283 INFO L276 IsEmpty]: Start isEmpty. Operand 5791 states and 24951 transitions. [2021-05-03 15:12:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:21,296 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:21,296 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:21,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-03 15:12:21,509 INFO L428 AbstractCegarLoop]: === Iteration 116 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:21,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1890243778, now seen corresponding path program 40 times [2021-05-03 15:12:21,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:21,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962894324] [2021-05-03 15:12:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:21,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962894324] [2021-05-03 15:12:21,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891931329] [2021-05-03 15:12:21,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:21,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:21,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:21,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:12:21,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:22,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:12:22,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:22,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:22,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:22,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-05-03 15:12:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:22,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:22,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 15:12:22,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691285524] [2021-05-03 15:12:22,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:22,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:22,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:22,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:22,212 INFO L87 Difference]: Start difference. First operand 5791 states and 24951 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:23,588 INFO L93 Difference]: Finished difference Result 6171 states and 26351 transitions. [2021-05-03 15:12:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 15:12:23,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:23,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:23,604 INFO L225 Difference]: With dead ends: 6171 [2021-05-03 15:12:23,604 INFO L226 Difference]: Without dead ends: 6152 [2021-05-03 15:12:23,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1268.2ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:12:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2021-05-03 15:12:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 5894. [2021-05-03 15:12:23,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5894 states, 5893 states have (on average 4.303241133548277) internal successors, (25359), 5893 states have internal predecessors, (25359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5894 states to 5894 states and 25359 transitions. [2021-05-03 15:12:23,712 INFO L78 Accepts]: Start accepts. Automaton has 5894 states and 25359 transitions. Word has length 33 [2021-05-03 15:12:23,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:23,712 INFO L480 AbstractCegarLoop]: Abstraction has 5894 states and 25359 transitions. [2021-05-03 15:12:23,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:23,712 INFO L276 IsEmpty]: Start isEmpty. Operand 5894 states and 25359 transitions. [2021-05-03 15:12:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:23,722 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:23,722 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:23,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:23,923 INFO L428 AbstractCegarLoop]: === Iteration 117 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash 185907592, now seen corresponding path program 41 times [2021-05-03 15:12:23,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:23,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852555588] [2021-05-03 15:12:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:24,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852555588] [2021-05-03 15:12:24,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383547695] [2021-05-03 15:12:24,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:24,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:24,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:24,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:12:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:24,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:12:24,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:24,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:24,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:24,412 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-05-03 15:12:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:24,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:24,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 15:12:24,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329978587] [2021-05-03 15:12:24,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:24,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:24,479 INFO L87 Difference]: Start difference. First operand 5894 states and 25359 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:26,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:26,042 INFO L93 Difference]: Finished difference Result 6283 states and 26782 transitions. [2021-05-03 15:12:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:12:26,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:26,058 INFO L225 Difference]: With dead ends: 6283 [2021-05-03 15:12:26,058 INFO L226 Difference]: Without dead ends: 6264 [2021-05-03 15:12:26,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1257.8ms TimeCoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 15:12:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6264 states. [2021-05-03 15:12:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6264 to 5918. [2021-05-03 15:12:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5918 states, 5917 states have (on average 4.304377218184891) internal successors, (25469), 5917 states have internal predecessors, (25469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5918 states to 5918 states and 25469 transitions. [2021-05-03 15:12:26,154 INFO L78 Accepts]: Start accepts. Automaton has 5918 states and 25469 transitions. Word has length 33 [2021-05-03 15:12:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:26,154 INFO L480 AbstractCegarLoop]: Abstraction has 5918 states and 25469 transitions. [2021-05-03 15:12:26,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 5918 states and 25469 transitions. [2021-05-03 15:12:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:26,163 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:26,163 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:26,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:26,363 INFO L428 AbstractCegarLoop]: === Iteration 118 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:26,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:26,364 INFO L82 PathProgramCache]: Analyzing trace with hash -265337576, now seen corresponding path program 42 times [2021-05-03 15:12:26,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:26,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213185772] [2021-05-03 15:12:26,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:26,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213185772] [2021-05-03 15:12:26,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190831232] [2021-05-03 15:12:26,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:26,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:12:26,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:26,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 15:12:26,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:27,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:27,106 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-05-03 15:12:27,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 53 [2021-05-03 15:12:27,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:27,161 INFO L628 ElimStorePlain]: treesize reduction 79, result has 21.8 percent of original size [2021-05-03 15:12:27,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-05-03 15:12:27,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-05-03 15:12:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:27,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:27,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 15:12:27,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490419054] [2021-05-03 15:12:27,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:12:27,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:27,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:12:27,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:12:27,307 INFO L87 Difference]: Start difference. First operand 5918 states and 25469 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:29,854 INFO L93 Difference]: Finished difference Result 6831 states and 28991 transitions. [2021-05-03 15:12:29,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:12:29,854 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:29,875 INFO L225 Difference]: With dead ends: 6831 [2021-05-03 15:12:29,875 INFO L226 Difference]: Without dead ends: 6812 [2021-05-03 15:12:29,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1917.2ms TimeCoverageRelationStatistics Valid=235, Invalid=2117, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 15:12:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6812 states. [2021-05-03 15:12:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6812 to 5924. [2021-05-03 15:12:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5924 states, 5923 states have (on average 4.303562383927064) internal successors, (25490), 5923 states have internal predecessors, (25490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 25490 transitions. [2021-05-03 15:12:29,972 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 25490 transitions. Word has length 33 [2021-05-03 15:12:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:29,972 INFO L480 AbstractCegarLoop]: Abstraction has 5924 states and 25490 transitions. [2021-05-03 15:12:29,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 25490 transitions. [2021-05-03 15:12:29,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:29,981 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:29,981 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:30,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:30,181 INFO L428 AbstractCegarLoop]: === Iteration 119 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:30,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1848381270, now seen corresponding path program 43 times [2021-05-03 15:12:30,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:30,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76701253] [2021-05-03 15:12:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:30,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76701253] [2021-05-03 15:12:30,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399987154] [2021-05-03 15:12:30,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:30,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:12:30,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:30,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:30,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-05-03 15:12:30,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:30,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:30,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:30,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-05-03 15:12:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:30,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:30,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 15:12:30,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784443513] [2021-05-03 15:12:30,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:30,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:30,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:30,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:30,773 INFO L87 Difference]: Start difference. First operand 5924 states and 25490 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:32,722 INFO L93 Difference]: Finished difference Result 6558 states and 27905 transitions. [2021-05-03 15:12:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:12:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:32,739 INFO L225 Difference]: With dead ends: 6558 [2021-05-03 15:12:32,739 INFO L226 Difference]: Without dead ends: 6539 [2021-05-03 15:12:32,739 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1458.0ms TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:12:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-05-03 15:12:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 5972. [2021-05-03 15:12:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 5971 states have (on average 4.307151230949589) internal successors, (25718), 5971 states have internal predecessors, (25718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 25718 transitions. [2021-05-03 15:12:32,848 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 25718 transitions. Word has length 33 [2021-05-03 15:12:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:32,848 INFO L480 AbstractCegarLoop]: Abstraction has 5972 states and 25718 transitions. [2021-05-03 15:12:32,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:32,848 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 25718 transitions. [2021-05-03 15:12:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:32,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:32,858 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:33,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-03 15:12:33,058 INFO L428 AbstractCegarLoop]: === Iteration 120 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:33,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1882988602, now seen corresponding path program 44 times [2021-05-03 15:12:33,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:33,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374458859] [2021-05-03 15:12:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:33,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374458859] [2021-05-03 15:12:33,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696692578] [2021-05-03 15:12:33,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:33,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:33,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:33,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:12:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:33,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:33,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-05-03 15:12:33,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:33,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:33,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:33,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-05-03 15:12:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:33,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:33,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-03 15:12:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151682040] [2021-05-03 15:12:33,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:12:33,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:33,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:12:33,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:12:33,843 INFO L87 Difference]: Start difference. First operand 5972 states and 25718 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:33,998 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-05-03 15:12:34,503 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-05-03 15:12:34,640 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2021-05-03 15:12:35,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:35,833 INFO L93 Difference]: Finished difference Result 6590 states and 28064 transitions. [2021-05-03 15:12:35,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:12:35,834 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:35,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:35,849 INFO L225 Difference]: With dead ends: 6590 [2021-05-03 15:12:35,850 INFO L226 Difference]: Without dead ends: 6571 [2021-05-03 15:12:35,850 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1817.0ms TimeCoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:12:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6571 states. [2021-05-03 15:12:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6571 to 5982. [2021-05-03 15:12:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5982 states, 5981 states have (on average 4.305132920916234) internal successors, (25749), 5981 states have internal predecessors, (25749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5982 states to 5982 states and 25749 transitions. [2021-05-03 15:12:35,979 INFO L78 Accepts]: Start accepts. Automaton has 5982 states and 25749 transitions. Word has length 33 [2021-05-03 15:12:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:35,979 INFO L480 AbstractCegarLoop]: Abstraction has 5982 states and 25749 transitions. [2021-05-03 15:12:35,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 5982 states and 25749 transitions. [2021-05-03 15:12:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:35,988 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:35,988 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:36,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:36,189 INFO L428 AbstractCegarLoop]: === Iteration 121 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:36,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1511763596, now seen corresponding path program 45 times [2021-05-03 15:12:36,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:36,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301001830] [2021-05-03 15:12:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:36,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301001830] [2021-05-03 15:12:36,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677694950] [2021-05-03 15:12:36,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:36,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:36,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:36,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 15:12:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:36,846 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:36,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-05-03 15:12:36,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:36,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:36,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:36,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:40 [2021-05-03 15:12:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:37,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:37,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-03 15:12:37,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545004942] [2021-05-03 15:12:37,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:12:37,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:37,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:12:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:12:37,162 INFO L87 Difference]: Start difference. First operand 5982 states and 25749 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:39,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:39,333 INFO L93 Difference]: Finished difference Result 6365 states and 27147 transitions. [2021-05-03 15:12:39,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:12:39,334 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:39,350 INFO L225 Difference]: With dead ends: 6365 [2021-05-03 15:12:39,350 INFO L226 Difference]: Without dead ends: 6356 [2021-05-03 15:12:39,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1971.4ms TimeCoverageRelationStatistics Valid=233, Invalid=1747, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 15:12:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2021-05-03 15:12:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 5982. [2021-05-03 15:12:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5982 states, 5981 states have (on average 4.305132920916234) internal successors, (25749), 5981 states have internal predecessors, (25749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5982 states to 5982 states and 25749 transitions. [2021-05-03 15:12:39,452 INFO L78 Accepts]: Start accepts. Automaton has 5982 states and 25749 transitions. Word has length 33 [2021-05-03 15:12:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:39,452 INFO L480 AbstractCegarLoop]: Abstraction has 5982 states and 25749 transitions. [2021-05-03 15:12:39,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 5982 states and 25749 transitions. [2021-05-03 15:12:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:39,463 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:39,463 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:39,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-03 15:12:39,665 INFO L428 AbstractCegarLoop]: === Iteration 122 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:39,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash -156629846, now seen corresponding path program 46 times [2021-05-03 15:12:39,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:39,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473036930] [2021-05-03 15:12:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:39,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473036930] [2021-05-03 15:12:39,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230863526] [2021-05-03 15:12:39,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:40,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:12:40,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:40,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:12:40,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:40,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:40,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:40,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-05-03 15:12:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:40,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:40,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 15:12:40,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633839766] [2021-05-03 15:12:40,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:40,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:40,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:40,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:40,367 INFO L87 Difference]: Start difference. First operand 5982 states and 25749 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:41,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:41,883 INFO L93 Difference]: Finished difference Result 6963 states and 29487 transitions. [2021-05-03 15:12:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 15:12:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:41,900 INFO L225 Difference]: With dead ends: 6963 [2021-05-03 15:12:41,900 INFO L226 Difference]: Without dead ends: 6940 [2021-05-03 15:12:41,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1034.4ms TimeCoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:12:41,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6940 states. [2021-05-03 15:12:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6940 to 6028. [2021-05-03 15:12:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 4.308279409324705) internal successors, (25966), 6027 states have internal predecessors, (25966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 25966 transitions. [2021-05-03 15:12:42,010 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 25966 transitions. Word has length 33 [2021-05-03 15:12:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:42,010 INFO L480 AbstractCegarLoop]: Abstraction has 6028 states and 25966 transitions. [2021-05-03 15:12:42,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:42,011 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 25966 transitions. [2021-05-03 15:12:42,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:42,020 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:42,020 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:42,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-05-03 15:12:42,220 INFO L428 AbstractCegarLoop]: === Iteration 123 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash 775417998, now seen corresponding path program 47 times [2021-05-03 15:12:42,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:42,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324059469] [2021-05-03 15:12:42,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:42,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324059469] [2021-05-03 15:12:42,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803003366] [2021-05-03 15:12:42,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:42,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:12:42,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:42,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 15:12:42,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:42,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:12:42,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:42,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:42,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:42,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-05-03 15:12:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:42,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:42,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-05-03 15:12:42,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55131343] [2021-05-03 15:12:42,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:12:42,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:42,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:12:42,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:12:42,917 INFO L87 Difference]: Start difference. First operand 6028 states and 25966 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:44,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:44,539 INFO L93 Difference]: Finished difference Result 6369 states and 27169 transitions. [2021-05-03 15:12:44,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 15:12:44,539 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:44,558 INFO L225 Difference]: With dead ends: 6369 [2021-05-03 15:12:44,559 INFO L226 Difference]: Without dead ends: 6350 [2021-05-03 15:12:44,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1221.5ms TimeCoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 15:12:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6350 states. [2021-05-03 15:12:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6350 to 6031. [2021-05-03 15:12:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6031 states, 6030 states have (on average 4.307960199004975) internal successors, (25977), 6030 states have internal predecessors, (25977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 25977 transitions. [2021-05-03 15:12:44,680 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 25977 transitions. Word has length 33 [2021-05-03 15:12:44,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:44,680 INFO L480 AbstractCegarLoop]: Abstraction has 6031 states and 25977 transitions. [2021-05-03 15:12:44,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:44,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 25977 transitions. [2021-05-03 15:12:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:44,692 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:44,692 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:44,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:44,892 INFO L428 AbstractCegarLoop]: === Iteration 124 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:44,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1742448126, now seen corresponding path program 48 times [2021-05-03 15:12:44,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:44,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047855246] [2021-05-03 15:12:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:45,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047855246] [2021-05-03 15:12:45,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549804287] [2021-05-03 15:12:45,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:45,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:12:45,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:45,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:12:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:45,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:45,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:12:45,578 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:45,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 55 [2021-05-03 15:12:45,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:12:45,638 INFO L628 ElimStorePlain]: treesize reduction 63, result has 32.3 percent of original size [2021-05-03 15:12:45,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:45,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:24 [2021-05-03 15:12:45,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:45,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:45,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 15:12:45,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491906045] [2021-05-03 15:12:45,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:12:45,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:45,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:12:45,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:12:45,833 INFO L87 Difference]: Start difference. First operand 6031 states and 25977 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:47,427 INFO L93 Difference]: Finished difference Result 6374 states and 27218 transitions. [2021-05-03 15:12:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 15:12:47,428 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:47,445 INFO L225 Difference]: With dead ends: 6374 [2021-05-03 15:12:47,445 INFO L226 Difference]: Without dead ends: 6361 [2021-05-03 15:12:47,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1485.9ms TimeCoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 15:12:47,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-05-03 15:12:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 6025. [2021-05-03 15:12:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 6024 states have (on average 4.308764940239044) internal successors, (25956), 6024 states have internal predecessors, (25956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 25956 transitions. [2021-05-03 15:12:47,551 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 25956 transitions. Word has length 33 [2021-05-03 15:12:47,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:47,552 INFO L480 AbstractCegarLoop]: Abstraction has 6025 states and 25956 transitions. [2021-05-03 15:12:47,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 25956 transitions. [2021-05-03 15:12:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:47,562 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:47,562 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:47,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:47,763 INFO L428 AbstractCegarLoop]: === Iteration 125 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:47,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:47,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1345285252, now seen corresponding path program 49 times [2021-05-03 15:12:47,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:47,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461112917] [2021-05-03 15:12:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:48,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461112917] [2021-05-03 15:12:48,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656770353] [2021-05-03 15:12:48,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:48,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:12:48,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:48,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:12:48,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:48,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:48,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:48,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-05-03 15:12:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:48,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:48,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 15:12:48,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414182155] [2021-05-03 15:12:48,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:12:48,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:48,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:12:48,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:12:48,579 INFO L87 Difference]: Start difference. First operand 6025 states and 25956 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:50,476 INFO L93 Difference]: Finished difference Result 6534 states and 27821 transitions. [2021-05-03 15:12:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 15:12:50,477 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:50,495 INFO L225 Difference]: With dead ends: 6534 [2021-05-03 15:12:50,495 INFO L226 Difference]: Without dead ends: 6515 [2021-05-03 15:12:50,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1464.5ms TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2021-05-03 15:12:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6515 states. [2021-05-03 15:12:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6515 to 6025. [2021-05-03 15:12:50,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 6024 states have (on average 4.308764940239044) internal successors, (25956), 6024 states have internal predecessors, (25956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 25956 transitions. [2021-05-03 15:12:50,606 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 25956 transitions. Word has length 33 [2021-05-03 15:12:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:50,606 INFO L480 AbstractCegarLoop]: Abstraction has 6025 states and 25956 transitions. [2021-05-03 15:12:50,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 25956 transitions. [2021-05-03 15:12:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:50,616 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:50,616 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:50,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-05-03 15:12:50,816 INFO L428 AbstractCegarLoop]: === Iteration 126 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:50,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1172580872, now seen corresponding path program 50 times [2021-05-03 15:12:50,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:50,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290358876] [2021-05-03 15:12:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290358876] [2021-05-03 15:12:51,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951950508] [2021-05-03 15:12:51,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:51,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:12:51,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:51,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 15:12:51,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:51,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-05-03 15:12:51,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:51,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:51,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:51,510 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:40 [2021-05-03 15:12:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:51,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:51,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-03 15:12:51,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99389127] [2021-05-03 15:12:51,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:12:51,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:51,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:12:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:12:51,737 INFO L87 Difference]: Start difference. First operand 6025 states and 25956 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:53,307 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-03 15:12:54,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:54,353 INFO L93 Difference]: Finished difference Result 6529 states and 27824 transitions. [2021-05-03 15:12:54,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 15:12:54,354 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:54,372 INFO L225 Difference]: With dead ends: 6529 [2021-05-03 15:12:54,372 INFO L226 Difference]: Without dead ends: 6516 [2021-05-03 15:12:54,372 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2159.5ms TimeCoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 15:12:54,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6516 states. [2021-05-03 15:12:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6516 to 6022. [2021-05-03 15:12:54,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6022 states, 6021 states have (on average 4.309084869622986) internal successors, (25945), 6021 states have internal predecessors, (25945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6022 states to 6022 states and 25945 transitions. [2021-05-03 15:12:54,487 INFO L78 Accepts]: Start accepts. Automaton has 6022 states and 25945 transitions. Word has length 33 [2021-05-03 15:12:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:54,487 INFO L480 AbstractCegarLoop]: Abstraction has 6022 states and 25945 transitions. [2021-05-03 15:12:54,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 6022 states and 25945 transitions. [2021-05-03 15:12:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:54,498 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:54,498 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:54,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:54,699 INFO L428 AbstractCegarLoop]: === Iteration 127 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:54,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:54,699 INFO L82 PathProgramCache]: Analyzing trace with hash 434922144, now seen corresponding path program 51 times [2021-05-03 15:12:54,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:54,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671148503] [2021-05-03 15:12:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:54,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671148503] [2021-05-03 15:12:54,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071734480] [2021-05-03 15:12:54,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:54,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:12:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-03 15:12:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:12:55,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:55,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-05-03 15:12:55,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:12:55,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:12:55,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:12:55,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:40 [2021-05-03 15:12:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:55,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:12:55,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-03 15:12:55,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248137345] [2021-05-03 15:12:55,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:12:55,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:12:55,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:12:55,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:12:55,554 INFO L87 Difference]: Start difference. First operand 6022 states and 25945 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:55,831 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-05-03 15:12:56,702 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 42 [2021-05-03 15:12:56,902 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-05-03 15:12:57,913 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-05-03 15:12:59,021 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-05-03 15:12:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:12:59,332 INFO L93 Difference]: Finished difference Result 6534 states and 27892 transitions. [2021-05-03 15:12:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-03 15:12:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:12:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:12:59,355 INFO L225 Difference]: With dead ends: 6534 [2021-05-03 15:12:59,355 INFO L226 Difference]: Without dead ends: 6521 [2021-05-03 15:12:59,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 3080.1ms TimeCoverageRelationStatistics Valid=328, Invalid=2324, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:12:59,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6521 states. [2021-05-03 15:12:59,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6521 to 6019. [2021-05-03 15:12:59,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6019 states, 6018 states have (on average 4.309571286141575) internal successors, (25935), 6018 states have internal predecessors, (25935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6019 states to 6019 states and 25935 transitions. [2021-05-03 15:12:59,466 INFO L78 Accepts]: Start accepts. Automaton has 6019 states and 25935 transitions. Word has length 33 [2021-05-03 15:12:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:12:59,466 INFO L480 AbstractCegarLoop]: Abstraction has 6019 states and 25935 transitions. [2021-05-03 15:12:59,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:12:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 6019 states and 25935 transitions. [2021-05-03 15:12:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:12:59,477 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:12:59,477 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:12:59,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:59,681 INFO L428 AbstractCegarLoop]: === Iteration 128 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:12:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:12:59,681 INFO L82 PathProgramCache]: Analyzing trace with hash 274621462, now seen corresponding path program 52 times [2021-05-03 15:12:59,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:12:59,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581341997] [2021-05-03 15:12:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:12:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:12:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:12:59,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581341997] [2021-05-03 15:12:59,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043715544] [2021-05-03 15:12:59,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:12:59,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:12:59,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:12:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:12:59,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:00,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:13:00,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:00,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:00,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:00,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-05-03 15:13:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:00,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:00,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:13:00,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636416656] [2021-05-03 15:13:00,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:00,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:00,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:00,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:00,301 INFO L87 Difference]: Start difference. First operand 6019 states and 25935 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:01,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:01,820 INFO L93 Difference]: Finished difference Result 6907 states and 29481 transitions. [2021-05-03 15:13:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:13:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:01,836 INFO L225 Difference]: With dead ends: 6907 [2021-05-03 15:13:01,837 INFO L226 Difference]: Without dead ends: 6876 [2021-05-03 15:13:01,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1072.7ms TimeCoverageRelationStatistics Valid=183, Invalid=1223, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 15:13:01,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-05-03 15:13:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5966. [2021-05-03 15:13:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5966 states, 5965 states have (on average 4.312321877619447) internal successors, (25723), 5965 states have internal predecessors, (25723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5966 states to 5966 states and 25723 transitions. [2021-05-03 15:13:01,937 INFO L78 Accepts]: Start accepts. Automaton has 5966 states and 25723 transitions. Word has length 33 [2021-05-03 15:13:01,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:01,937 INFO L480 AbstractCegarLoop]: Abstraction has 5966 states and 25723 transitions. [2021-05-03 15:13:01,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 5966 states and 25723 transitions. [2021-05-03 15:13:01,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:01,946 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:01,946 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:02,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:02,148 INFO L428 AbstractCegarLoop]: === Iteration 129 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:02,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:02,148 INFO L82 PathProgramCache]: Analyzing trace with hash 142194076, now seen corresponding path program 53 times [2021-05-03 15:13:02,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:02,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224247995] [2021-05-03 15:13:02,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:02,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224247995] [2021-05-03 15:13:02,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632022405] [2021-05-03 15:13:02,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:02,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 15:13:02,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:02,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:13:02,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:02,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-05-03 15:13:02,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:02,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:02,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:02,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-05-03 15:13:02,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:02,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:02,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:13:02,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987928437] [2021-05-03 15:13:02,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:02,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:02,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:02,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:02,967 INFO L87 Difference]: Start difference. First operand 5966 states and 25723 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:03,720 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-05-03 15:13:03,987 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-03 15:13:05,055 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 15:13:06,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:06,012 INFO L93 Difference]: Finished difference Result 7061 states and 29695 transitions. [2021-05-03 15:13:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 15:13:06,013 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:06,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:06,033 INFO L225 Difference]: With dead ends: 7061 [2021-05-03 15:13:06,033 INFO L226 Difference]: Without dead ends: 7046 [2021-05-03 15:13:06,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 2443.8ms TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 15:13:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7046 states. [2021-05-03 15:13:06,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7046 to 6017. [2021-05-03 15:13:06,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6017 states, 6016 states have (on average 4.31499335106383) internal successors, (25959), 6016 states have internal predecessors, (25959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:06,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 25959 transitions. [2021-05-03 15:13:06,161 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 25959 transitions. Word has length 33 [2021-05-03 15:13:06,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:06,161 INFO L480 AbstractCegarLoop]: Abstraction has 6017 states and 25959 transitions. [2021-05-03 15:13:06,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:06,161 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 25959 transitions. [2021-05-03 15:13:06,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:06,172 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:06,172 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:06,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-03 15:13:06,373 INFO L428 AbstractCegarLoop]: === Iteration 130 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:06,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:06,373 INFO L82 PathProgramCache]: Analyzing trace with hash -210945414, now seen corresponding path program 54 times [2021-05-03 15:13:06,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:06,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833240287] [2021-05-03 15:13:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:06,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833240287] [2021-05-03 15:13:06,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101235578] [2021-05-03 15:13:06,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:06,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 15:13:06,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-03 15:13:06,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:06,957 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:06,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-05-03 15:13:06,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:06,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:06,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:06,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:49 [2021-05-03 15:13:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:07,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:07,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-03 15:13:07,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216674592] [2021-05-03 15:13:07,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:13:07,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:13:07,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:13:07,458 INFO L87 Difference]: Start difference. First operand 6017 states and 25959 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:08,021 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 43 [2021-05-03 15:13:08,171 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-05-03 15:13:08,909 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-05-03 15:13:11,437 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-05-03 15:13:12,444 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-05-03 15:13:12,604 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 15:13:12,783 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-05-03 15:13:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:12,809 INFO L93 Difference]: Finished difference Result 6943 states and 29496 transitions. [2021-05-03 15:13:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 15:13:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:12,828 INFO L225 Difference]: With dead ends: 6943 [2021-05-03 15:13:12,828 INFO L226 Difference]: Without dead ends: 6920 [2021-05-03 15:13:12,828 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 4239.4ms TimeCoverageRelationStatistics Valid=340, Invalid=3566, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 15:13:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6920 states. [2021-05-03 15:13:12,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6920 to 6069. [2021-05-03 15:13:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6068 states have (on average 4.317897165458141) internal successors, (26201), 6068 states have internal predecessors, (26201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 26201 transitions. [2021-05-03 15:13:12,946 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 26201 transitions. Word has length 33 [2021-05-03 15:13:12,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:12,946 INFO L480 AbstractCegarLoop]: Abstraction has 6069 states and 26201 transitions. [2021-05-03 15:13:12,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:12,946 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 26201 transitions. [2021-05-03 15:13:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:12,957 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:12,957 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:13,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-03 15:13:13,158 INFO L428 AbstractCegarLoop]: === Iteration 131 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:13,158 INFO L82 PathProgramCache]: Analyzing trace with hash -399786980, now seen corresponding path program 55 times [2021-05-03 15:13:13,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:13,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896652954] [2021-05-03 15:13:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:13,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:13,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896652954] [2021-05-03 15:13:13,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400329340] [2021-05-03 15:13:13,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:13:13,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:13,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 15:13:13,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:13,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:13,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:13,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-05-03 15:13:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:13,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:13,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:13:13,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134896659] [2021-05-03 15:13:13,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:13,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:13,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:13,871 INFO L87 Difference]: Start difference. First operand 6069 states and 26201 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:14,619 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-05-03 15:13:14,880 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-05-03 15:13:16,128 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 15:13:17,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:17,017 INFO L93 Difference]: Finished difference Result 7343 states and 31064 transitions. [2021-05-03 15:13:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 15:13:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:17,037 INFO L225 Difference]: With dead ends: 7343 [2021-05-03 15:13:17,038 INFO L226 Difference]: Without dead ends: 7319 [2021-05-03 15:13:17,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 2367.3ms TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 15:13:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7319 states. [2021-05-03 15:13:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7319 to 6181. [2021-05-03 15:13:17,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 4.316990291262136) internal successors, (26679), 6180 states have internal predecessors, (26679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 26679 transitions. [2021-05-03 15:13:17,171 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 26679 transitions. Word has length 33 [2021-05-03 15:13:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:17,171 INFO L480 AbstractCegarLoop]: Abstraction has 6181 states and 26679 transitions. [2021-05-03 15:13:17,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 26679 transitions. [2021-05-03 15:13:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:17,183 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:17,183 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:17,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-05-03 15:13:17,383 INFO L428 AbstractCegarLoop]: === Iteration 132 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:17,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2068180422, now seen corresponding path program 56 times [2021-05-03 15:13:17,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:17,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952230477] [2021-05-03 15:13:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:17,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952230477] [2021-05-03 15:13:17,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480269798] [2021-05-03 15:13:17,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:17,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:13:17,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:17,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 15:13:17,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:17,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:17,946 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:17,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-05-03 15:13:17,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:17,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:17,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:17,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:40 [2021-05-03 15:13:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:18,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:18,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-05-03 15:13:18,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83205314] [2021-05-03 15:13:18,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:18,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:18,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:18,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:18,258 INFO L87 Difference]: Start difference. First operand 6181 states and 26679 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:19,224 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-03 15:13:20,352 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 15:13:20,616 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 15:13:22,121 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-05-03 15:13:22,751 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-05-03 15:13:23,264 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-05-03 15:13:23,551 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-05-03 15:13:24,200 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-05-03 15:13:24,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:24,712 INFO L93 Difference]: Finished difference Result 7856 states and 32442 transitions. [2021-05-03 15:13:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-03 15:13:24,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:24,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:24,731 INFO L225 Difference]: With dead ends: 7856 [2021-05-03 15:13:24,731 INFO L226 Difference]: Without dead ends: 7811 [2021-05-03 15:13:24,732 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 5097.8ms TimeCoverageRelationStatistics Valid=696, Invalid=4854, Unknown=0, NotChecked=0, Total=5550 [2021-05-03 15:13:24,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7811 states. [2021-05-03 15:13:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7811 to 6228. [2021-05-03 15:13:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6228 states, 6227 states have (on average 4.327926770515497) internal successors, (26950), 6227 states have internal predecessors, (26950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 26950 transitions. [2021-05-03 15:13:24,865 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 26950 transitions. Word has length 33 [2021-05-03 15:13:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:24,865 INFO L480 AbstractCegarLoop]: Abstraction has 6228 states and 26950 transitions. [2021-05-03 15:13:24,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 26950 transitions. [2021-05-03 15:13:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:24,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:24,877 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:25,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:25,078 INFO L428 AbstractCegarLoop]: === Iteration 133 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:25,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1424413324, now seen corresponding path program 57 times [2021-05-03 15:13:25,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:25,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124713629] [2021-05-03 15:13:25,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:25,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:25,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124713629] [2021-05-03 15:13:25,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813403308] [2021-05-03 15:13:25,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:25,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 15:13:25,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:25,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 15:13:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:25,780 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-05-03 15:13:25,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 57 [2021-05-03 15:13:25,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:25,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:25,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:25,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:44 [2021-05-03 15:13:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:26,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:26,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-03 15:13:26,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518031227] [2021-05-03 15:13:26,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:13:26,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:26,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:13:26,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:13:26,085 INFO L87 Difference]: Start difference. First operand 6228 states and 26950 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:26,373 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-05-03 15:13:27,389 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-05-03 15:13:30,673 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-05-03 15:13:30,831 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-05-03 15:13:30,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:30,855 INFO L93 Difference]: Finished difference Result 7254 states and 31067 transitions. [2021-05-03 15:13:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-03 15:13:30,856 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:30,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:30,875 INFO L225 Difference]: With dead ends: 7254 [2021-05-03 15:13:30,875 INFO L226 Difference]: Without dead ends: 7239 [2021-05-03 15:13:30,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 3839.9ms TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 15:13:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7239 states. [2021-05-03 15:13:31,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7239 to 6302. [2021-05-03 15:13:31,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6302 states, 6301 states have (on average 4.330899857165529) internal successors, (27289), 6301 states have internal predecessors, (27289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:31,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6302 states to 6302 states and 27289 transitions. [2021-05-03 15:13:31,044 INFO L78 Accepts]: Start accepts. Automaton has 6302 states and 27289 transitions. Word has length 33 [2021-05-03 15:13:31,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:31,044 INFO L480 AbstractCegarLoop]: Abstraction has 6302 states and 27289 transitions. [2021-05-03 15:13:31,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:31,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6302 states and 27289 transitions. [2021-05-03 15:13:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:31,056 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:31,056 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:31,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:31,264 INFO L428 AbstractCegarLoop]: === Iteration 134 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:31,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1613254890, now seen corresponding path program 58 times [2021-05-03 15:13:31,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:31,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969036480] [2021-05-03 15:13:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:31,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969036480] [2021-05-03 15:13:31,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351113455] [2021-05-03 15:13:31,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:31,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:13:31,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:31,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:13:31,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:31,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 15:13:31,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:31,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:31,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:31,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-05-03 15:13:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:32,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:32,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:13:32,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293116921] [2021-05-03 15:13:32,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:32,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:32,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:32,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:32,111 INFO L87 Difference]: Start difference. First operand 6302 states and 27289 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:32,623 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-05-03 15:13:32,890 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-05-03 15:13:34,715 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 15:13:35,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:35,626 INFO L93 Difference]: Finished difference Result 7897 states and 33399 transitions. [2021-05-03 15:13:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-03 15:13:35,627 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:35,648 INFO L225 Difference]: With dead ends: 7897 [2021-05-03 15:13:35,648 INFO L226 Difference]: Without dead ends: 7869 [2021-05-03 15:13:35,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2730.0ms TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 15:13:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7869 states. [2021-05-03 15:13:35,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7869 to 6527. [2021-05-03 15:13:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6527 states, 6526 states have (on average 4.333282255593012) internal successors, (28279), 6526 states have internal predecessors, (28279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6527 states to 6527 states and 28279 transitions. [2021-05-03 15:13:35,787 INFO L78 Accepts]: Start accepts. Automaton has 6527 states and 28279 transitions. Word has length 33 [2021-05-03 15:13:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:35,787 INFO L480 AbstractCegarLoop]: Abstraction has 6527 states and 28279 transitions. [2021-05-03 15:13:35,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:35,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6527 states and 28279 transitions. [2021-05-03 15:13:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:35,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:35,800 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:36,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:36,000 INFO L428 AbstractCegarLoop]: === Iteration 135 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1013318964, now seen corresponding path program 59 times [2021-05-03 15:13:36,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:36,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892073760] [2021-05-03 15:13:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:36,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892073760] [2021-05-03 15:13:36,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184762068] [2021-05-03 15:13:36,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:36,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 15:13:36,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:36,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:13:36,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:36,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 15:13:36,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:36,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:36,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:36,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-05-03 15:13:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:36,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:36,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 15:13:36,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404565053] [2021-05-03 15:13:36,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:13:36,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:36,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:13:36,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:13:36,837 INFO L87 Difference]: Start difference. First operand 6527 states and 28279 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:37,419 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-05-03 15:13:37,701 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-03 15:13:39,571 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 15:13:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:41,017 INFO L93 Difference]: Finished difference Result 8340 states and 34687 transitions. [2021-05-03 15:13:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-03 15:13:41,018 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:41,040 INFO L225 Difference]: With dead ends: 8340 [2021-05-03 15:13:41,040 INFO L226 Difference]: Without dead ends: 8271 [2021-05-03 15:13:41,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 3277.2ms TimeCoverageRelationStatistics Valid=452, Invalid=2970, Unknown=0, NotChecked=0, Total=3422 [2021-05-03 15:13:41,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8271 states. [2021-05-03 15:13:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8271 to 6430. [2021-05-03 15:13:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6430 states, 6429 states have (on average 4.336755327422616) internal successors, (27881), 6429 states have internal predecessors, (27881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6430 states to 6430 states and 27881 transitions. [2021-05-03 15:13:41,186 INFO L78 Accepts]: Start accepts. Automaton has 6430 states and 27881 transitions. Word has length 33 [2021-05-03 15:13:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:41,186 INFO L480 AbstractCegarLoop]: Abstraction has 6430 states and 27881 transitions. [2021-05-03 15:13:41,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 6430 states and 27881 transitions. [2021-05-03 15:13:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:41,198 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:41,198 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:41,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 15:13:41,399 INFO L428 AbstractCegarLoop]: === Iteration 136 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:41,399 INFO L82 PathProgramCache]: Analyzing trace with hash 171020724, now seen corresponding path program 60 times [2021-05-03 15:13:41,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:41,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129452754] [2021-05-03 15:13:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:41,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:41,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129452754] [2021-05-03 15:13:41,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432156392] [2021-05-03 15:13:41,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:41,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 15:13:41,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:41,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:13:41,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:42,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:42,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-05-03 15:13:42,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:42,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:42,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:42,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-05-03 15:13:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:42,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:42,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-03 15:13:42,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241323967] [2021-05-03 15:13:42,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:13:42,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:42,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:13:42,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:13:42,402 INFO L87 Difference]: Start difference. First operand 6430 states and 27881 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:42,613 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-05-03 15:13:43,249 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2021-05-03 15:13:43,625 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2021-05-03 15:13:43,921 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-05-03 15:13:44,091 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-05-03 15:13:44,864 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-05-03 15:13:45,443 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 15:13:46,319 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-05-03 15:13:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:47,460 INFO L93 Difference]: Finished difference Result 7375 states and 31790 transitions. [2021-05-03 15:13:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 15:13:47,461 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:47,485 INFO L225 Difference]: With dead ends: 7375 [2021-05-03 15:13:47,485 INFO L226 Difference]: Without dead ends: 7335 [2021-05-03 15:13:47,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 3978.8ms TimeCoverageRelationStatistics Valid=433, Invalid=2759, Unknown=0, NotChecked=0, Total=3192 [2021-05-03 15:13:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7335 states. [2021-05-03 15:13:47,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7335 to 6439. [2021-05-03 15:13:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6439 states, 6438 states have (on average 4.337527182354768) internal successors, (27925), 6438 states have internal predecessors, (27925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6439 states to 6439 states and 27925 transitions. [2021-05-03 15:13:47,660 INFO L78 Accepts]: Start accepts. Automaton has 6439 states and 27925 transitions. Word has length 33 [2021-05-03 15:13:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:47,660 INFO L480 AbstractCegarLoop]: Abstraction has 6439 states and 27925 transitions. [2021-05-03 15:13:47,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6439 states and 27925 transitions. [2021-05-03 15:13:47,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:47,673 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:47,673 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:47,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-03 15:13:47,873 INFO L428 AbstractCegarLoop]: === Iteration 137 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:47,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1030111212, now seen corresponding path program 61 times [2021-05-03 15:13:47,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:47,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616120078] [2021-05-03 15:13:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:48,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616120078] [2021-05-03 15:13:48,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136523806] [2021-05-03 15:13:48,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:48,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:13:48,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:48,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:13:48,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:48,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:48,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:48,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-05-03 15:13:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:48,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:48,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:13:48,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301442420] [2021-05-03 15:13:48,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:48,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:48,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:48,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:48,981 INFO L87 Difference]: Start difference. First operand 6439 states and 27925 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:50,047 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 15:13:50,271 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-05-03 15:13:53,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:13:53,881 INFO L93 Difference]: Finished difference Result 8679 states and 36578 transitions. [2021-05-03 15:13:53,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 15:13:53,882 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:13:53,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:13:53,906 INFO L225 Difference]: With dead ends: 8679 [2021-05-03 15:13:53,906 INFO L226 Difference]: Without dead ends: 8632 [2021-05-03 15:13:53,906 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 3690.2ms TimeCoverageRelationStatistics Valid=485, Invalid=3421, Unknown=0, NotChecked=0, Total=3906 [2021-05-03 15:13:53,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8632 states. [2021-05-03 15:13:54,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8632 to 6709. [2021-05-03 15:13:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 6708 states have (on average 4.349135360763268) internal successors, (29174), 6708 states have internal predecessors, (29174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 29174 transitions. [2021-05-03 15:13:54,104 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 29174 transitions. Word has length 33 [2021-05-03 15:13:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:13:54,104 INFO L480 AbstractCegarLoop]: Abstraction has 6709 states and 29174 transitions. [2021-05-03 15:13:54,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 29174 transitions. [2021-05-03 15:13:54,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:13:54,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:13:54,116 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:13:54,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-05-03 15:13:54,316 INFO L428 AbstractCegarLoop]: === Iteration 138 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:13:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:13:54,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1407621076, now seen corresponding path program 62 times [2021-05-03 15:13:54,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:13:54,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556259060] [2021-05-03 15:13:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:13:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:13:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:54,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556259060] [2021-05-03 15:13:54,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363300133] [2021-05-03 15:13:54,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:13:54,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:13:54,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:13:54,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 15:13:54,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:13:55,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:13:55,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:55,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-05-03 15:13:55,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:13:55,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:13:55,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:13:55,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:41 [2021-05-03 15:13:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:13:55,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:13:55,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-05-03 15:13:55,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587894801] [2021-05-03 15:13:55,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:13:55,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:13:55,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:13:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:13:55,325 INFO L87 Difference]: Start difference. First operand 6709 states and 29174 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:13:56,442 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 15:13:57,271 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 15:13:57,660 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-05-03 15:13:58,058 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2021-05-03 15:13:58,497 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-05-03 15:13:58,836 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2021-05-03 15:13:59,872 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-03 15:14:00,035 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-03 15:14:00,206 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 15:14:00,804 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-05-03 15:14:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:00,826 INFO L93 Difference]: Finished difference Result 8823 states and 36373 transitions. [2021-05-03 15:14:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-03 15:14:00,827 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:14:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:00,849 INFO L225 Difference]: With dead ends: 8823 [2021-05-03 15:14:00,849 INFO L226 Difference]: Without dead ends: 8778 [2021-05-03 15:14:00,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 4591.4ms TimeCoverageRelationStatistics Valid=515, Invalid=3145, Unknown=0, NotChecked=0, Total=3660 [2021-05-03 15:14:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8778 states. [2021-05-03 15:14:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8778 to 6689. [2021-05-03 15:14:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6689 states, 6688 states have (on average 4.350927033492823) internal successors, (29099), 6688 states have internal predecessors, (29099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6689 states to 6689 states and 29099 transitions. [2021-05-03 15:14:00,986 INFO L78 Accepts]: Start accepts. Automaton has 6689 states and 29099 transitions. Word has length 33 [2021-05-03 15:14:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:00,986 INFO L480 AbstractCegarLoop]: Abstraction has 6689 states and 29099 transitions. [2021-05-03 15:14:00,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 6689 states and 29099 transitions. [2021-05-03 15:14:00,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:14:00,999 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:00,999 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:01,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:01,199 INFO L428 AbstractCegarLoop]: === Iteration 139 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:01,200 INFO L82 PathProgramCache]: Analyzing trace with hash 565322836, now seen corresponding path program 63 times [2021-05-03 15:14:01,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:01,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389117263] [2021-05-03 15:14:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:01,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389117263] [2021-05-03 15:14:01,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375407444] [2021-05-03 15:14:01,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:01,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 15:14:01,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:01,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-03 15:14:01,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:01,929 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-05-03 15:14:01,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 55 [2021-05-03 15:14:01,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:14:02,004 INFO L628 ElimStorePlain]: treesize reduction 74, result has 15.9 percent of original size [2021-05-03 15:14:02,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:02,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:14 [2021-05-03 15:14:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:02,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:02,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-05-03 15:14:02,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882536724] [2021-05-03 15:14:02,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-03 15:14:02,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:02,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-03 15:14:02,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2021-05-03 15:14:02,273 INFO L87 Difference]: Start difference. First operand 6689 states and 29099 transitions. Second operand has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:03,413 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 15:14:03,669 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 15:14:05,831 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 15:14:06,147 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-03 15:14:06,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:06,519 INFO L93 Difference]: Finished difference Result 7782 states and 33391 transitions. [2021-05-03 15:14:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 15:14:06,520 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:14:06,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:06,541 INFO L225 Difference]: With dead ends: 7782 [2021-05-03 15:14:06,541 INFO L226 Difference]: Without dead ends: 7742 [2021-05-03 15:14:06,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 3491.8ms TimeCoverageRelationStatistics Valid=406, Invalid=3134, Unknown=0, NotChecked=0, Total=3540 [2021-05-03 15:14:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7742 states. [2021-05-03 15:14:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7742 to 6713. [2021-05-03 15:14:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6713 states, 6712 states have (on average 4.35280095351609) internal successors, (29216), 6712 states have internal predecessors, (29216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6713 states to 6713 states and 29216 transitions. [2021-05-03 15:14:06,731 INFO L78 Accepts]: Start accepts. Automaton has 6713 states and 29216 transitions. Word has length 33 [2021-05-03 15:14:06,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:06,732 INFO L480 AbstractCegarLoop]: Abstraction has 6713 states and 29216 transitions. [2021-05-03 15:14:06,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 26 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 6713 states and 29216 transitions. [2021-05-03 15:14:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:14:06,745 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:06,746 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:06,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:06,946 INFO L428 AbstractCegarLoop]: === Iteration 140 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:06,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:06,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1531067708, now seen corresponding path program 64 times [2021-05-03 15:14:06,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:06,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343108572] [2021-05-03 15:14:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:07,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343108572] [2021-05-03 15:14:07,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356214202] [2021-05-03 15:14:07,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:07,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 15:14:07,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:07,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:14:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:07,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:14:07,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-05-03 15:14:07,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:07,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:07,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:07,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-05-03 15:14:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:07,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:07,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 15:14:07,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16466118] [2021-05-03 15:14:07,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:14:07,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:07,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:14:07,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:14:07,776 INFO L87 Difference]: Start difference. First operand 6713 states and 29216 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:08,672 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-05-03 15:14:09,036 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-05-03 15:14:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:10,758 INFO L93 Difference]: Finished difference Result 8314 states and 35206 transitions. [2021-05-03 15:14:10,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 15:14:10,760 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:14:10,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:10,782 INFO L225 Difference]: With dead ends: 8314 [2021-05-03 15:14:10,782 INFO L226 Difference]: Without dead ends: 8260 [2021-05-03 15:14:10,782 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2203.3ms TimeCoverageRelationStatistics Valid=264, Invalid=1898, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 15:14:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-05-03 15:14:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 6732. [2021-05-03 15:14:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6732 states, 6731 states have (on average 4.350319417619967) internal successors, (29282), 6731 states have internal predecessors, (29282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6732 states to 6732 states and 29282 transitions. [2021-05-03 15:14:10,931 INFO L78 Accepts]: Start accepts. Automaton has 6732 states and 29282 transitions. Word has length 33 [2021-05-03 15:14:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:10,931 INFO L480 AbstractCegarLoop]: Abstraction has 6732 states and 29282 transitions. [2021-05-03 15:14:10,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:10,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states and 29282 transitions. [2021-05-03 15:14:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:14:10,948 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:10,948 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:11,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-03 15:14:11,165 INFO L428 AbstractCegarLoop]: === Iteration 141 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1105113426, now seen corresponding path program 65 times [2021-05-03 15:14:11,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:11,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640476246] [2021-05-03 15:14:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:11,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640476246] [2021-05-03 15:14:11,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594069560] [2021-05-03 15:14:11,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:11,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 15:14:11,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:11,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:14:11,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:11,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-05-03 15:14:11,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:11,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:11,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:11,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-05-03 15:14:11,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:11,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:11,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-05-03 15:14:11,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917899974] [2021-05-03 15:14:11,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 15:14:11,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:11,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 15:14:11,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-05-03 15:14:11,893 INFO L87 Difference]: Start difference. First operand 6732 states and 29282 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:14,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:14,587 INFO L93 Difference]: Finished difference Result 7332 states and 31486 transitions. [2021-05-03 15:14:14,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 15:14:14,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:14:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:14,607 INFO L225 Difference]: With dead ends: 7332 [2021-05-03 15:14:14,607 INFO L226 Difference]: Without dead ends: 7277 [2021-05-03 15:14:14,607 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1657.0ms TimeCoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2021-05-03 15:14:14,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7277 states. [2021-05-03 15:14:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7277 to 6738. [2021-05-03 15:14:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6738 states, 6737 states have (on average 4.348671515511355) internal successors, (29297), 6737 states have internal predecessors, (29297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:14,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6738 states to 6738 states and 29297 transitions. [2021-05-03 15:14:14,741 INFO L78 Accepts]: Start accepts. Automaton has 6738 states and 29297 transitions. Word has length 33 [2021-05-03 15:14:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:14,741 INFO L480 AbstractCegarLoop]: Abstraction has 6738 states and 29297 transitions. [2021-05-03 15:14:14,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:14,741 INFO L276 IsEmpty]: Start isEmpty. Operand 6738 states and 29297 transitions. [2021-05-03 15:14:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:14:14,754 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:14,754 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:14,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-03 15:14:14,955 INFO L428 AbstractCegarLoop]: === Iteration 142 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:14,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:14,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1571821348, now seen corresponding path program 66 times [2021-05-03 15:14:14,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:14,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815233452] [2021-05-03 15:14:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:15,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815233452] [2021-05-03 15:14:15,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83283640] [2021-05-03 15:14:15,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:15,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 15:14:15,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:15,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:14:15,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:15,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:14:15,680 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-05-03 15:14:15,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-05-03 15:14:15,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-05-03 15:14:15,736 INFO L628 ElimStorePlain]: treesize reduction 84, result has 22.2 percent of original size [2021-05-03 15:14:15,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:15,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:24 [2021-05-03 15:14:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:16,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:16,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-05-03 15:14:16,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309523208] [2021-05-03 15:14:16,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-03 15:14:16,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-03 15:14:16,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-05-03 15:14:16,010 INFO L87 Difference]: Start difference. First operand 6738 states and 29297 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:16,421 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-05-03 15:14:17,259 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-05-03 15:14:19,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:19,563 INFO L93 Difference]: Finished difference Result 7374 states and 31639 transitions. [2021-05-03 15:14:19,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 15:14:19,564 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:14:19,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:19,584 INFO L225 Difference]: With dead ends: 7374 [2021-05-03 15:14:19,584 INFO L226 Difference]: Without dead ends: 7315 [2021-05-03 15:14:19,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 2730.1ms TimeCoverageRelationStatistics Valid=222, Invalid=2130, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 15:14:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7315 states. [2021-05-03 15:14:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7315 to 6720. [2021-05-03 15:14:19,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6720 states, 6719 states have (on average 4.348861437713945) internal successors, (29220), 6719 states have internal predecessors, (29220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6720 states to 6720 states and 29220 transitions. [2021-05-03 15:14:19,718 INFO L78 Accepts]: Start accepts. Automaton has 6720 states and 29220 transitions. Word has length 33 [2021-05-03 15:14:19,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:19,718 INFO L480 AbstractCegarLoop]: Abstraction has 6720 states and 29220 transitions. [2021-05-03 15:14:19,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6720 states and 29220 transitions. [2021-05-03 15:14:19,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:14:19,732 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:19,732 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:19,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:19,932 INFO L428 AbstractCegarLoop]: === Iteration 143 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:19,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:19,933 INFO L82 PathProgramCache]: Analyzing trace with hash 506133940, now seen corresponding path program 67 times [2021-05-03 15:14:19,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:19,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585207277] [2021-05-03 15:14:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:20,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585207277] [2021-05-03 15:14:20,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610370764] [2021-05-03 15:14:20,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:20,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-03 15:14:20,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:20,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-03 15:14:20,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-05-03 15:14:20,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:20,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:20,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:20,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-05-03 15:14:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:20,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:20,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-05-03 15:14:20,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403908698] [2021-05-03 15:14:20,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 15:14:20,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 15:14:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 15:14:20,966 INFO L87 Difference]: Start difference. First operand 6720 states and 29220 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:21,750 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-05-03 15:14:21,989 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-03 15:14:22,260 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-05-03 15:14:22,560 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 15:14:22,812 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-03 15:14:24,078 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2021-05-03 15:14:24,445 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-03 15:14:24,663 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 15:14:25,247 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-05-03 15:14:25,639 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-05-03 15:14:25,848 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 15:14:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:27,023 INFO L93 Difference]: Finished difference Result 8172 states and 34913 transitions. [2021-05-03 15:14:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-03 15:14:27,024 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:14:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:27,047 INFO L225 Difference]: With dead ends: 8172 [2021-05-03 15:14:27,047 INFO L226 Difference]: Without dead ends: 8148 [2021-05-03 15:14:27,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 4880.2ms TimeCoverageRelationStatistics Valid=448, Invalid=3334, Unknown=0, NotChecked=0, Total=3782 [2021-05-03 15:14:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8148 states. [2021-05-03 15:14:27,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8148 to 6849. [2021-05-03 15:14:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6849 states, 6848 states have (on average 4.353533878504673) internal successors, (29813), 6848 states have internal predecessors, (29813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6849 states to 6849 states and 29813 transitions. [2021-05-03 15:14:27,193 INFO L78 Accepts]: Start accepts. Automaton has 6849 states and 29813 transitions. Word has length 33 [2021-05-03 15:14:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:27,193 INFO L480 AbstractCegarLoop]: Abstraction has 6849 states and 29813 transitions. [2021-05-03 15:14:27,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 6849 states and 29813 transitions. [2021-05-03 15:14:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-03 15:14:27,207 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 15:14:27,207 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 15:14:27,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:27,407 INFO L428 AbstractCegarLoop]: === Iteration 144 === [thread1Thread1of1ForFork1Err2INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 15:14:27,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 15:14:27,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1351101068, now seen corresponding path program 68 times [2021-05-03 15:14:27,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 15:14:27,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883778185] [2021-05-03 15:14:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 15:14:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 15:14:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:27,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883778185] [2021-05-03 15:14:27,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372510176] [2021-05-03 15:14:27,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:27,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 15:14:27,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 15:14:27,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-03 15:14:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 15:14:28,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:28,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-05-03 15:14:28,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 15:14:28,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 15:14:28,294 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 15:14:28,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:33 [2021-05-03 15:14:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 15:14:28,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 15:14:28,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-05-03 15:14:28,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496231217] [2021-05-03 15:14:28,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 15:14:28,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 15:14:28,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 15:14:28,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-05-03 15:14:28,571 INFO L87 Difference]: Start difference. First operand 6849 states and 29813 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:28,856 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-05-03 15:14:29,221 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-05-03 15:14:29,533 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 15:14:29,777 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 15:14:30,264 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 15:14:30,900 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-05-03 15:14:31,209 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-05-03 15:14:31,448 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-05-03 15:14:31,745 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 15:14:32,130 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-05-03 15:14:32,418 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 15:14:32,617 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2021-05-03 15:14:33,105 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 15:14:33,439 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 15:14:34,043 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-05-03 15:14:34,352 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2021-05-03 15:14:34,492 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-05-03 15:14:35,006 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-05-03 15:14:35,405 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-05-03 15:14:35,648 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2021-05-03 15:14:36,030 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-05-03 15:14:36,381 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2021-05-03 15:14:36,582 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-05-03 15:14:36,807 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-05-03 15:14:37,037 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 15:14:37,230 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-03 15:14:37,607 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 15:14:37,776 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-05-03 15:14:38,138 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-05-03 15:14:38,398 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-05-03 15:14:38,669 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2021-05-03 15:14:38,955 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-05-03 15:14:39,248 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2021-05-03 15:14:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 15:14:39,287 INFO L93 Difference]: Finished difference Result 17152 states and 71601 transitions. [2021-05-03 15:14:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-03 15:14:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-05-03 15:14:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 15:14:39,289 INFO L225 Difference]: With dead ends: 17152 [2021-05-03 15:14:39,289 INFO L226 Difference]: Without dead ends: 0 [2021-05-03 15:14:39,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 8895.2ms TimeCoverageRelationStatistics Valid=1027, Invalid=4979, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 15:14:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-03 15:14:39,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-03 15:14:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-03 15:14:39,290 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2021-05-03 15:14:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 15:14:39,291 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-03 15:14:39,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 15:14:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-03 15:14:39,291 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-03 15:14:39,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 15:14:39,494 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 03:14:39 BasicIcfg [2021-05-03 15:14:39,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 15:14:39,495 INFO L168 Benchmark]: Toolchain (without parser) took 266347.06 ms. Allocated memory was 369.1 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 348.5 MB in the beginning and 838.6 MB in the end (delta: -490.2 MB). Peak memory consumption was 619.1 MB. Max. memory is 16.0 GB. [2021-05-03 15:14:39,495 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 369.1 MB. Free memory was 349.7 MB in the beginning and 349.7 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:14:39,495 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.35 ms. Allocated memory is still 369.1 MB. Free memory was 348.4 MB in the beginning and 346.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 15:14:39,495 INFO L168 Benchmark]: Boogie Preprocessor took 19.48 ms. Allocated memory is still 369.1 MB. Free memory was 346.9 MB in the beginning and 345.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-05-03 15:14:39,495 INFO L168 Benchmark]: RCFGBuilder took 344.84 ms. Allocated memory is still 369.1 MB. Free memory was 345.8 MB in the beginning and 329.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. [2021-05-03 15:14:39,495 INFO L168 Benchmark]: TraceAbstraction took 265940.37 ms. Allocated memory was 369.1 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 328.8 MB in the beginning and 838.6 MB in the end (delta: -509.8 MB). Peak memory consumption was 598.1 MB. Max. memory is 16.0 GB. [2021-05-03 15:14:39,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 369.1 MB. Free memory was 349.7 MB in the beginning and 349.7 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 32.35 ms. Allocated memory is still 369.1 MB. Free memory was 348.4 MB in the beginning and 346.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.48 ms. Allocated memory is still 369.1 MB. Free memory was 346.9 MB in the beginning and 345.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 344.84 ms. Allocated memory is still 369.1 MB. Free memory was 345.8 MB in the beginning and 329.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 265940.37 ms. Allocated memory was 369.1 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 328.8 MB in the beginning and 838.6 MB in the end (delta: -509.8 MB). Peak memory consumption was 598.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 107]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 265675.3ms, OverallIterations: 144, TraceHistogramMax: 2, EmptinessCheckTime: 834.2ms, AutomataDifference: 161649.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 65.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14044 SDtfs, 46451 SDslu, 150039 SDs, 0 SdLazy, 93775 SolverSat, 6433 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41471.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7322 GetRequests, 3071 SyntacticMatches, 255 SemanticMatches, 3996 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30546 ImplicationChecksByTransitivity, 131988.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6849occurred in iteration=143, InterpolantAutomatonStates: 3113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 8666.6ms AutomataMinimizationTime, 144 MinimizatonAttempts, 87229 StatesRemovedByMinimization, 143 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1084.0ms SsaConstructionTime, 2400.2ms SatisfiabilityAnalysisTime, 58896.6ms InterpolantComputationTime, 8484 NumberOfCodeBlocks, 8484 NumberOfCodeBlocksAsserted, 415 NumberOfCheckSat, 8200 ConstructedInterpolants, 20 QuantifiedInterpolants, 125073 SizeOfPredicates, 1562 NumberOfNonLiveVariables, 18375 ConjunctsInSsa, 3930 ConjunctsInUnsatCore, 284 InterpolantComputations, 5 PerfectInterpolantSequences, 56/960 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...