/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-Sleep-NoLbe-New_States.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-12 18:03:10,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-12 18:03:10,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-12 18:03:10,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-12 18:03:10,557 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-12 18:03:10,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-12 18:03:10,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-12 18:03:10,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-12 18:03:10,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-12 18:03:10,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-12 18:03:10,564 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-12 18:03:10,565 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-12 18:03:10,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-12 18:03:10,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-12 18:03:10,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-12 18:03:10,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-12 18:03:10,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-12 18:03:10,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-12 18:03:10,571 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-12 18:03:10,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-12 18:03:10,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-12 18:03:10,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-12 18:03:10,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-12 18:03:10,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-12 18:03:10,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-12 18:03:10,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-12 18:03:10,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-12 18:03:10,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-12 18:03:10,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-12 18:03:10,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-12 18:03:10,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-12 18:03:10,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-12 18:03:10,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-12 18:03:10,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-12 18:03:10,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-12 18:03:10,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-12 18:03:10,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-12 18:03:10,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-12 18:03:10,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-12 18:03:10,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-12 18:03:10,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-12 18:03:10,588 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-Sleep-NoLbe-New_States.epf [2021-03-12 18:03:10,607 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-12 18:03:10,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-12 18:03:10,608 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-12 18:03:10,608 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-12 18:03:10,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-12 18:03:10,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-12 18:03:10,609 INFO L138 SettingsManager]: * Use SBE=true [2021-03-12 18:03:10,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-12 18:03:10,610 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-12 18:03:10,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-12 18:03:10,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-12 18:03:10,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-12 18:03:10,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-12 18:03:10,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-12 18:03:10,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-12 18:03:10,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-12 18:03:10,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-12 18:03:10,611 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-12 18:03:10,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-12 18:03:10,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-12 18:03:10,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-12 18:03:10,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-12 18:03:10,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-12 18:03:10,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-12 18:03:10,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-12 18:03:10,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-12 18:03:10,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-12 18:03:10,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-12 18:03:10,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-12 18:03:10,613 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-12 18:03:10,614 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-03-12 18:03:10,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-12 18:03:10,614 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2021-03-12 18:03:10,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-12 18:03:10,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-12 18:03:10,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-12 18:03:10,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-12 18:03:10,952 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-12 18:03:10,955 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-12 18:03:10,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl [2021-03-12 18:03:10,967 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/buffer-mult-alt.wvr.bpl' [2021-03-12 18:03:10,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-12 18:03:10,997 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-12 18:03:10,998 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-12 18:03:10,999 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-12 18:03:10,999 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-12 18:03:11,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/1) ... [2021-03-12 18:03:11,017 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/1) ... [2021-03-12 18:03:11,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-12 18:03:11,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-12 18:03:11,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-12 18:03:11,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-12 18:03:11,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/1) ... [2021-03-12 18:03:11,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/1) ... [2021-03-12 18:03:11,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/1) ... [2021-03-12 18:03:11,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/1) ... [2021-03-12 18:03:11,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/1) ... [2021-03-12 18:03:11,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/1) ... [2021-03-12 18:03:11,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/1) ... [2021-03-12 18:03:11,051 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-12 18:03:11,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-12 18:03:11,052 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-12 18:03:11,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-12 18:03:11,054 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (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 [2021-03-12 18:03:11,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-12 18:03:11,111 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-12 18:03:11,111 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-12 18:03:11,111 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-12 18:03:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-12 18:03:11,112 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-12 18:03:11,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-12 18:03:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-12 18:03:11,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-12 18:03:11,112 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-12 18:03:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-12 18:03:11,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-12 18:03:11,114 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-12 18:03:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-12 18:03:11,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-12 18:03:11,116 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-12 18:03:11,382 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-12 18:03:11,382 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-12 18:03:11,384 INFO L202 PluginConnector]: Adding new model buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 06:03:11 BoogieIcfgContainer [2021-03-12 18:03:11,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-12 18:03:11,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-12 18:03:11,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-12 18:03:11,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-12 18:03:11,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.03 06:03:10" (1/2) ... [2021-03-12 18:03:11,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596d66a4 and model type buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.03 06:03:11, skipping insertion in model container [2021-03-12 18:03:11,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.03 06:03:11" (2/2) ... [2021-03-12 18:03:11,405 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult-alt.wvr.bpl [2021-03-12 18:03:11,409 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-12 18:03:11,409 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-12 18:03:11,412 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-12 18:03:11,413 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-12 18:03:11,482 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-03-12 18:03:11,496 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-03-12 18:03:11,548 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-12 18:03:11,549 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-12 18:03:11,549 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-12 18:03:11,549 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-12 18:03:11,549 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-12 18:03:11,549 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-12 18:03:11,549 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-12 18:03:11,549 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-12 18:03:11,744 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 18:03:11,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 18:03:11,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1171514158, now seen corresponding path program 1 times [2021-03-12 18:03:11,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 18:03:11,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130151306] [2021-03-12 18:03:11,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 18:03:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-03-12 18:03:11,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130151306] [2021-03-12 18:03:11,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 18:03:11,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-12 18:03:11,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974650459] [2021-03-12 18:03:11,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-12 18:03:11,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 18:03:11,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-12 18:03:11,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-12 18:03:11,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:11,904 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-03-12 18:03:11,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 18:03:11,910 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:11,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-12 18:03:11,943 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 18:03:11,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 18:03:11,944 INFO L82 PathProgramCache]: Analyzing trace with hash 18138360, now seen corresponding path program 1 times [2021-03-12 18:03:11,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 18:03:11,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761770522] [2021-03-12 18:03:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 18:03:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-12 18:03:11,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761770522] [2021-03-12 18:03:11,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-12 18:03:11,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-12 18:03:11,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856799573] [2021-03-12 18:03:11,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-12 18:03:11,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 18:03:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-12 18:03:11,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-12 18:03:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:11,985 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-03-12 18:03:11,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 18:03:11,985 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:11,985 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-12 18:03:12,043 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 18:03:12,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 18:03:12,044 INFO L82 PathProgramCache]: Analyzing trace with hash 456489213, now seen corresponding path program 2 times [2021-03-12 18:03:12,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 18:03:12,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837908135] [2021-03-12 18:03:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 18:03:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-12 18:03:12,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837908135] [2021-03-12 18:03:12,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023895029] [2021-03-12 18:03:12,122 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 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 [2021-03-12 18:03:12,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-12 18:03:12,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-12 18:03:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-12 18:03:12,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-12 18:03:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-12 18:03:12,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-12 18:03:12,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-03-12 18:03:12,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300031771] [2021-03-12 18:03:12,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-12 18:03:12,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 18:03:12,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-12 18:03:12,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-12 18:03:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:12,338 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-03-12 18:03:12,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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) [2021-03-12 18:03:12,338 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,338 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,338 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:12,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-12 18:03:12,639 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 18:03:12,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 18:03:12,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1322921287, now seen corresponding path program 2 times [2021-03-12 18:03:12,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 18:03:12,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608766341] [2021-03-12 18:03:12,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 18:03:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-12 18:03:12,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608766341] [2021-03-12 18:03:12,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102254711] [2021-03-12 18:03:12,724 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 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 [2021-03-12 18:03:12,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-12 18:03:12,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-12 18:03:12,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-12 18:03:12,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-12 18:03:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-12 18:03:12,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-12 18:03:12,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-12 18:03:12,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340080118] [2021-03-12 18:03:12,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-12 18:03:12,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 18:03:12,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-12 18:03:12,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-12 18:03:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:12,854 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-03-12 18:03:12,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 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) [2021-03-12 18:03:12,855 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,855 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,855 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:12,855 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:12,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:13,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-12 18:03:13,123 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 18:03:13,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 18:03:13,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1189027837, now seen corresponding path program 3 times [2021-03-12 18:03:13,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 18:03:13,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951554611] [2021-03-12 18:03:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 18:03:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 18:03:13,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951554611] [2021-03-12 18:03:13,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311175300] [2021-03-12 18:03:13,407 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 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 [2021-03-12 18:03:13,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-12 18:03:13,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-12 18:03:13,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-12 18:03:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-12 18:03:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-12 18:03:13,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-12 18:03:13,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-12 18:03:13,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 18:03:13,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 67 [2021-03-12 18:03:14,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-12 18:03:14,090 INFO L628 ElimStorePlain]: treesize reduction 122, result has 26.5 percent of original size [2021-03-12 18:03:14,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-12 18:03:14,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:40 [2021-03-12 18:03:14,240 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 27 treesize of output 21 [2021-03-12 18:03:14,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-12 18:03:14,251 INFO L628 ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size [2021-03-12 18:03:14,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-12 18:03:14,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:9 [2021-03-12 18:03:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 18:03:14,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-12 18:03:14,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-03-12 18:03:14,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313602484] [2021-03-12 18:03:14,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-12 18:03:14,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 18:03:14,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-12 18:03:14,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-03-12 18:03:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:14,301 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-03-12 18:03:14,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 18:03:14,301 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:14,301 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:14,302 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:14,302 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:14,302 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:15,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:15,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:15,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-12 18:03:15,275 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 18:03:15,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 18:03:15,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1960506161, now seen corresponding path program 1 times [2021-03-12 18:03:15,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 18:03:15,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140169312] [2021-03-12 18:03:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 18:03:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-03-12 18:03:15,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140169312] [2021-03-12 18:03:15,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560997932] [2021-03-12 18:03:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-12 18:03:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-12 18:03:15,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-12 18:03:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-03-12 18:03:15,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-12 18:03:15,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-03-12 18:03:15,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664913513] [2021-03-12 18:03:15,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-12 18:03:15,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 18:03:15,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-12 18:03:15,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-12 18:03:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:15,456 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-03-12 18:03:15,456 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) [2021-03-12 18:03:15,456 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:15,457 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:15,457 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:15,457 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:15,457 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:15,457 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-12 18:03:15,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-12 18:03:15,739 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 18:03:15,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 18:03:15,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1774181709, now seen corresponding path program 4 times [2021-03-12 18:03:15,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 18:03:15,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649627428] [2021-03-12 18:03:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 18:03:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 18:03:15,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649627428] [2021-03-12 18:03:15,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838150381] [2021-03-12 18:03:15,988 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 [2021-03-12 18:03:16,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-12 18:03:16,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-12 18:03:16,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-12 18:03:16,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-12 18:03:16,498 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-03-12 18:03:16,498 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 90 treesize of output 48 [2021-03-12 18:03:16,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-12 18:03:16,513 INFO L628 ElimStorePlain]: treesize reduction 25, result has 34.2 percent of original size [2021-03-12 18:03:16,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-12 18:03:16,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:90, output treesize:13 [2021-03-12 18:03:16,556 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 13 [2021-03-12 18:03:16,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-12 18:03:16,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-12 18:03:16,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-12 18:03:16,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:7 [2021-03-12 18:03:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 18:03:16,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-12 18:03:16,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-03-12 18:03:16,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522717813] [2021-03-12 18:03:16,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-12 18:03:16,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 18:03:16,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-12 18:03:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-03-12 18:03:16,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:16,604 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-03-12 18:03:16,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 23 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 18:03:16,604 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:16,604 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:16,604 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:16,604 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:16,604 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:16,604 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-03-12 18:03:16,604 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:17,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-12 18:03:17,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:17,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-12 18:03:17,522 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 18:03:17,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 18:03:17,523 INFO L82 PathProgramCache]: Analyzing trace with hash -527659471, now seen corresponding path program 5 times [2021-03-12 18:03:17,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 18:03:17,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903071556] [2021-03-12 18:03:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 18:03:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-12 18:03:17,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903071556] [2021-03-12 18:03:17,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572180295] [2021-03-12 18:03:17,647 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 [2021-03-12 18:03:17,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-12 18:03:17,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-12 18:03:17,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-12 18:03:17,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-12 18:03:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-12 18:03:17,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-12 18:03:17,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 12 [2021-03-12 18:03:17,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873466544] [2021-03-12 18:03:17,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-12 18:03:17,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-12 18:03:17,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-12 18:03:17,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-12 18:03:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:17,803 INFO L480 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-03-12 18:03:17,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-12 18:03:17,804 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:17,804 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:17,804 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:17,804 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:17,804 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:17,804 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-03-12 18:03:17,804 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:17,804 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-03-12 18:03:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-12 18:03:17,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-12 18:03:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-12 18:03:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-12 18:03:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-12 18:03:18,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-12 18:03:18,127 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-12 18:03:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-12 18:03:18,128 INFO L82 PathProgramCache]: Analyzing trace with hash 116015757, now seen corresponding path program 6 times [2021-03-12 18:03:18,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-12 18:03:18,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984806856] [2021-03-12 18:03:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-12 18:03:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-12 18:03:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-12 18:03:18,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984806856] [2021-03-12 18:03:18,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059153348] [2021-03-12 18:03:18,387 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 [2021-03-12 18:03:18,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-12 18:03:18,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-12 18:03:18,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-12 18:03:18,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-12 18:03:19,207 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2021-03-12 18:03:19,207 INFO L354 Elim1Store]: treesize reduction 66, result has 59.0 percent of original size [2021-03-12 18:03:19,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 111 treesize of output 153 [2021-03-12 18:03:20,980 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 564 [2021-03-12 18:03:21,182 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 722 DAG size of output: 599 [2021-03-12 18:03:21,339 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 750 DAG size of output: 621 [2021-03-12 18:03:21,505 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 790 DAG size of output: 657 [2021-03-12 18:03:21,879 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 564 [2021-03-12 18:03:21,997 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 722 DAG size of output: 599 [2021-03-12 18:03:22,181 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 750 DAG size of output: 621 [2021-03-12 18:03:22,681 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 793 DAG size of output: 660 [2021-03-12 18:03:23,070 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 859 DAG size of output: 719 [2021-03-12 18:03:23,491 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 564 [2021-03-12 18:03:23,610 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 722 DAG size of output: 599 [2021-03-12 18:03:23,740 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 766 DAG size of output: 633 [2021-03-12 18:03:23,869 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 797 DAG size of output: 663 [2021-03-12 18:03:23,996 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 854 DAG size of output: 716 [2021-03-12 18:03:24,434 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 945 DAG size of output: 795 [2021-03-12 18:03:24,751 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 564 [2021-03-12 18:03:24,915 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 722 DAG size of output: 599 [2021-03-12 18:03:25,071 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 750 DAG size of output: 621 [2021-03-12 18:03:25,496 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 762 DAG size of output: 633 [2021-03-12 18:03:25,707 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 799 DAG size of output: 663 [2021-03-12 18:03:25,939 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 848 DAG size of output: 708 [2021-03-12 18:03:26,509 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 1079 DAG size of output: 902 [2021-03-12 18:03:27,240 WARN L205 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 1079 DAG size of output: 902 [2021-03-12 18:03:27,832 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 1086 DAG size of output: 882 [2021-03-12 18:03:27,975 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 703 [2021-03-12 18:03:28,111 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 663 [2021-03-12 18:03:29,099 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 1483 DAG size of output: 783 [2021-03-12 18:03:42,868 WARN L205 SmtUtils]: Spent 8.55 s on a formula simplification. DAG size of input: 7027 DAG size of output: 3467 [2021-03-12 18:12:29,262 WARN L205 SmtUtils]: Spent 7.34 m on a formula simplification. DAG size of input: 44902 DAG size of output: 21707 [2021-03-12 18:12:30,582 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 3213 DAG size of output: 2219 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown