/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/regression/showcase/Fischer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 20:35:39,572 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 20:35:39,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 20:35:39,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 20:35:39,645 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 [2021-06-05 20:35:39,669 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 20:35:39,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 20:35:39,670 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 20:35:39,670 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 20:35:39,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 20:35:39,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 20:35:39,671 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 20:35:39,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 20:35:39,672 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 20:35:39,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 20:35:39,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 20:35:39,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 20:35:39,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 20:35:39,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 20:35:39,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 20:35:39,673 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 20:35:39,673 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 20:35:39,673 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 20:35:39,673 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 20:35:39,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 20:35:39,674 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 20:35:39,674 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 20:35:39,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 20:35:39,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 20:35:39,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 20:35:39,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 20:35:39,674 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 20:35:39,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 20:35:39,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 20:35:39,675 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 20:35:39,675 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 20:35:39,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 20:35:39,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 20:35:39,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 20:35:39,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 20:35:39,952 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 20:35:39,952 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 20:35:39,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Fischer.bpl [2021-06-05 20:35:39,953 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/Fischer.bpl' [2021-06-05 20:35:39,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 20:35:39,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 20:35:39,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 20:35:39,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 20:35:39,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 20:35:39,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/1) ... [2021-06-05 20:35:39,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/1) ... [2021-06-05 20:35:39,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 20:35:40,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 20:35:40,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 20:35:40,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 20:35:40,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/1) ... [2021-06-05 20:35:40,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/1) ... [2021-06-05 20:35:40,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/1) ... [2021-06-05 20:35:40,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/1) ... [2021-06-05 20:35:40,009 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/1) ... [2021-06-05 20:35:40,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/1) ... [2021-06-05 20:35:40,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/1) ... [2021-06-05 20:35:40,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 20:35:40,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 20:35:40,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 20:35:40,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 20:35:40,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (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 [2021-06-05 20:35:40,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process2 given in one single declaration [2021-06-05 20:35:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure Process2 [2021-06-05 20:35:40,068 INFO L138 BoogieDeclarations]: Found implementation of procedure Process2 [2021-06-05 20:35:40,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-05 20:35:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-05 20:35:40,068 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-05 20:35:40,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 20:35:40,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 20:35:40,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 20:35:40,069 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Clock given in one single declaration [2021-06-05 20:35:40,069 INFO L130 BoogieDeclarations]: Found specification of procedure Clock [2021-06-05 20:35:40,069 INFO L138 BoogieDeclarations]: Found implementation of procedure Clock [2021-06-05 20:35:40,069 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 20:35:40,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 20:35:40,191 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 20:35:40,192 INFO L202 PluginConnector]: Adding new model Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:35:40 BoogieIcfgContainer [2021-06-05 20:35:40,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 20:35:40,193 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 20:35:40,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 20:35:40,195 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 20:35:40,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Fischer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 08:35:39" (1/2) ... [2021-06-05 20:35:40,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42183e73 and model type Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 08:35:40, skipping insertion in model container [2021-06-05 20:35:40,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 08:35:40" (2/2) ... [2021-06-05 20:35:40,197 INFO L111 eAbstractionObserver]: Analyzing ICFG Fischer.bpl [2021-06-05 20:35:40,201 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 20:35:40,201 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 20:35:40,201 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-06-05 20:35:40,201 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 20:35:40,218 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,219 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,219 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,219 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,220 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,220 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,220 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,220 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,221 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,221 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,222 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,222 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,222 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,222 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,222 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,223 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,228 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,230 WARN L313 ript$VariableManager]: TermVariabe Process2Thread1of1ForFork2_deadline not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 20:35:40,233 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 20:35:40,260 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 20:35:40,279 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:35:40,279 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 20:35:40,279 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:35:40,279 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:35:40,279 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:35:40,279 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:35:40,279 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:35:40,280 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process2Thread1of1ForFork2======== [2021-06-05 20:35:40,286 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 46 transitions, 107 flow [2021-06-05 20:35:40,387 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,391 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 20:35:40,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:40,397 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:40,397 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:40,400 INFO L82 PathProgramCache]: Analyzing trace with hash -173258256, now seen corresponding path program 1 times [2021-06-05 20:35:40,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:40,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743934332] [2021-06-05 20:35:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:40,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:40,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743934332] [2021-06-05 20:35:40,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743934332] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:40,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:40,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-05 20:35:40,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893109489] [2021-06-05 20:35:40,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:40,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:40,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,494 INFO L87 Difference]: Start difference. First operand has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 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 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:40,534 INFO L93 Difference]: Finished difference Result 398 states and 1386 transitions. [2021-06-05 20:35:40,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:40,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-06-05 20:35:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:40,545 INFO L225 Difference]: With dead ends: 398 [2021-06-05 20:35:40,546 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 20:35:40,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 20:35:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 350. [2021-06-05 20:35:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 350 states have (on average 3.5314285714285716) internal successors, (1236), 349 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1236 transitions. [2021-06-05 20:35:40,604 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1236 transitions. Word has length 9 [2021-06-05 20:35:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:40,604 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1236 transitions. [2021-06-05 20:35:40,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1236 transitions. [2021-06-05 20:35:40,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 20:35:40,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:40,606 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:40,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 20:35:40,606 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:40,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:40,607 INFO L82 PathProgramCache]: Analyzing trace with hash 403762029, now seen corresponding path program 1 times [2021-06-05 20:35:40,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:40,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86517500] [2021-06-05 20:35:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:40,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:40,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86517500] [2021-06-05 20:35:40,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86517500] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:40,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:40,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:35:40,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204843008] [2021-06-05 20:35:40,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:40,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,649 INFO L87 Difference]: Start difference. First operand 350 states and 1236 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:40,697 INFO L93 Difference]: Finished difference Result 569 states and 1978 transitions. [2021-06-05 20:35:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:40,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-06-05 20:35:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:40,701 INFO L225 Difference]: With dead ends: 569 [2021-06-05 20:35:40,701 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 20:35:40,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 20:35:40,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 359. [2021-06-05 20:35:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 359 states have (on average 3.367688022284123) internal successors, (1209), 358 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1209 transitions. [2021-06-05 20:35:40,717 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1209 transitions. Word has length 12 [2021-06-05 20:35:40,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:40,717 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1209 transitions. [2021-06-05 20:35:40,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1209 transitions. [2021-06-05 20:35:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 20:35:40,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:40,719 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:40,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 20:35:40,719 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:40,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1014496749, now seen corresponding path program 2 times [2021-06-05 20:35:40,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:40,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938039266] [2021-06-05 20:35:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:40,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:40,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938039266] [2021-06-05 20:35:40,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938039266] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:40,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:40,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:35:40,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397350344] [2021-06-05 20:35:40,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:40,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:40,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:40,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,751 INFO L87 Difference]: Start difference. First operand 359 states and 1209 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:40,779 INFO L93 Difference]: Finished difference Result 461 states and 1548 transitions. [2021-06-05 20:35:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-06-05 20:35:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:40,781 INFO L225 Difference]: With dead ends: 461 [2021-06-05 20:35:40,781 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 20:35:40,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 20:35:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 415. [2021-06-05 20:35:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 415 states have (on average 3.346987951807229) internal successors, (1389), 414 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1389 transitions. [2021-06-05 20:35:40,805 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1389 transitions. Word has length 12 [2021-06-05 20:35:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:40,805 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1389 transitions. [2021-06-05 20:35:40,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1389 transitions. [2021-06-05 20:35:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 20:35:40,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:40,810 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:40,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 20:35:40,811 INFO L430 AbstractCegarLoop]: === Iteration 4 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:40,811 INFO L82 PathProgramCache]: Analyzing trace with hash -654503842, now seen corresponding path program 1 times [2021-06-05 20:35:40,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:40,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741012196] [2021-06-05 20:35:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:40,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:40,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741012196] [2021-06-05 20:35:40,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741012196] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:40,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:40,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:35:40,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274787634] [2021-06-05 20:35:40,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:40,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:40,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,855 INFO L87 Difference]: Start difference. First operand 415 states and 1389 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:40,879 INFO L93 Difference]: Finished difference Result 487 states and 1625 transitions. [2021-06-05 20:35:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:40,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-06-05 20:35:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:40,882 INFO L225 Difference]: With dead ends: 487 [2021-06-05 20:35:40,882 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 20:35:40,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 20:35:40,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 463. [2021-06-05 20:35:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 463 states have (on average 3.32829373650108) internal successors, (1541), 462 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1541 transitions. [2021-06-05 20:35:40,899 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1541 transitions. Word has length 19 [2021-06-05 20:35:40,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:40,899 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1541 transitions. [2021-06-05 20:35:40,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1541 transitions. [2021-06-05 20:35:40,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 20:35:40,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:40,901 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:40,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 20:35:40,901 INFO L430 AbstractCegarLoop]: === Iteration 5 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:40,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:40,901 INFO L82 PathProgramCache]: Analyzing trace with hash -654193678, now seen corresponding path program 2 times [2021-06-05 20:35:40,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:40,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714718258] [2021-06-05 20:35:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:40,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:40,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714718258] [2021-06-05 20:35:40,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714718258] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:40,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:40,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:35:40,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703574332] [2021-06-05 20:35:40,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:40,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:40,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:40,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,926 INFO L87 Difference]: Start difference. First operand 463 states and 1541 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:40,962 INFO L93 Difference]: Finished difference Result 499 states and 1644 transitions. [2021-06-05 20:35:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:40,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-06-05 20:35:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:40,966 INFO L225 Difference]: With dead ends: 499 [2021-06-05 20:35:40,966 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 20:35:40,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:40,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 20:35:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 379. [2021-06-05 20:35:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 379 states have (on average 3.2506596306068603) internal successors, (1232), 378 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1232 transitions. [2021-06-05 20:35:40,974 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1232 transitions. Word has length 19 [2021-06-05 20:35:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:40,974 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1232 transitions. [2021-06-05 20:35:40,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1232 transitions. [2021-06-05 20:35:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 20:35:40,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:40,975 INFO L554 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] [2021-06-05 20:35:40,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 20:35:40,975 INFO L430 AbstractCegarLoop]: === Iteration 6 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2077212379, now seen corresponding path program 1 times [2021-06-05 20:35:40,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:40,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619433275] [2021-06-05 20:35:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619433275] [2021-06-05 20:35:41,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619433275] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 20:35:41,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629135815] [2021-06-05 20:35:41,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 20:35:41,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 20:35:41,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 20:35:41,023 INFO L87 Difference]: Start difference. First operand 379 states and 1232 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,050 INFO L93 Difference]: Finished difference Result 398 states and 1271 transitions. [2021-06-05 20:35:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 20:35:41,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-06-05 20:35:41,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,053 INFO L225 Difference]: With dead ends: 398 [2021-06-05 20:35:41,053 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 20:35:41,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:35:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 20:35:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-06-05 20:35:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 398 states have (on average 3.193467336683417) internal successors, (1271), 397 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1271 transitions. [2021-06-05 20:35:41,062 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1271 transitions. Word has length 26 [2021-06-05 20:35:41,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,063 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1271 transitions. [2021-06-05 20:35:41,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1271 transitions. [2021-06-05 20:35:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:35:41,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,064 INFO L554 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] [2021-06-05 20:35:41,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 20:35:41,064 INFO L430 AbstractCegarLoop]: === Iteration 7 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1176211918, now seen corresponding path program 1 times [2021-06-05 20:35:41,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222455190] [2021-06-05 20:35:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222455190] [2021-06-05 20:35:41,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222455190] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 20:35:41,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476391447] [2021-06-05 20:35:41,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:35:41,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:35:41,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:35:41,113 INFO L87 Difference]: Start difference. First operand 398 states and 1271 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-06-05 20:35:41,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,225 INFO L93 Difference]: Finished difference Result 468 states and 1458 transitions. [2021-06-05 20:35:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:35:41,225 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 [2021-06-05 20:35:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,227 INFO L225 Difference]: With dead ends: 468 [2021-06-05 20:35:41,227 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 20:35:41,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:35:41,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 20:35:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2021-06-05 20:35:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 384 states have (on average 3.203125) internal successors, (1230), 383 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1230 transitions. [2021-06-05 20:35:41,235 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1230 transitions. Word has length 27 [2021-06-05 20:35:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,235 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1230 transitions. [2021-06-05 20:35:41,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-06-05 20:35:41,235 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1230 transitions. [2021-06-05 20:35:41,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:35:41,236 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,236 INFO L554 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] [2021-06-05 20:35:41,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 20:35:41,236 INFO L430 AbstractCegarLoop]: === Iteration 8 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 505048550, now seen corresponding path program 2 times [2021-06-05 20:35:41,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023411377] [2021-06-05 20:35:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023411377] [2021-06-05 20:35:41,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023411377] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 20:35:41,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500442903] [2021-06-05 20:35:41,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 20:35:41,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 20:35:41,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 20:35:41,256 INFO L87 Difference]: Start difference. First operand 384 states and 1230 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-06-05 20:35:41,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,276 INFO L93 Difference]: Finished difference Result 402 states and 1269 transitions. [2021-06-05 20:35:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 20:35:41,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 [2021-06-05 20:35:41,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,278 INFO L225 Difference]: With dead ends: 402 [2021-06-05 20:35:41,278 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 20:35:41,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:35:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 20:35:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2021-06-05 20:35:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 402 states have (on average 3.156716417910448) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-06-05 20:35:41,287 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 27 [2021-06-05 20:35:41,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,287 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-06-05 20:35:41,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-06-05 20:35:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-06-05 20:35:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 20:35:41,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,288 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 20:35:41,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 20:35:41,288 INFO L430 AbstractCegarLoop]: === Iteration 9 === [Process2Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2085590105, now seen corresponding path program 3 times [2021-06-05 20:35:41,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492684896] [2021-06-05 20:35:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492684896] [2021-06-05 20:35:41,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492684896] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 20:35:41,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799418126] [2021-06-05 20:35:41,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:35:41,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:35:41,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:35:41,332 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,408 INFO L93 Difference]: Finished difference Result 244 states and 724 transitions. [2021-06-05 20:35:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:35:41,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-06-05 20:35:41,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,410 INFO L225 Difference]: With dead ends: 244 [2021-06-05 20:35:41,410 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 20:35:41,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:35:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 20:35:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 20:35:41,412 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) [2021-06-05 20:35:41,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 20:35:41,412 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-05 20:35:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,413 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 20:35:41,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 20:35:41,413 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 20:35:41,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 20:35:41,413 INFO L301 ceAbstractionStarter]: Result for error location Process2Thread1of1ForFork2 was SAFE (1/5) [2021-06-05 20:35:41,415 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 20:35:41,416 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:35:41,416 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 20:35:41,416 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:35:41,416 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:35:41,416 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:35:41,416 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:35:41,416 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:35:41,416 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process2======== [2021-06-05 20:35:41,418 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 46 transitions, 107 flow [2021-06-05 20:35:41,452 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,458 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 20:35:41,458 INFO L301 ceAbstractionStarter]: Result for error location Process2 was SAFE (2/5) [2021-06-05 20:35:41,459 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 20:35:41,461 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:35:41,461 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 20:35:41,461 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:35:41,461 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:35:41,461 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:35:41,461 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:35:41,461 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:35:41,461 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process1======== [2021-06-05 20:35:41,464 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 46 transitions, 107 flow [2021-06-05 20:35:41,495 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,501 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 20:35:41,501 INFO L301 ceAbstractionStarter]: Result for error location Process1 was SAFE (3/5) [2021-06-05 20:35:41,502 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 20:35:41,502 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:35:41,502 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 20:35:41,502 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:35:41,502 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:35:41,503 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:35:41,503 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:35:41,503 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:35:41,503 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 20:35:41,503 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 46 transitions, 107 flow [2021-06-05 20:35:41,548 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,550 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,554 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 20:35:41,555 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was SAFE (4/5) [2021-06-05 20:35:41,555 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 20:35:41,555 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 20:35:41,555 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 20:35:41,555 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 20:35:41,555 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 20:35:41,556 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 20:35:41,556 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 20:35:41,556 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 20:35:41,556 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == Process1Thread1of1ForFork1======== [2021-06-05 20:35:41,557 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 46 transitions, 107 flow [2021-06-05 20:35:41,581 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 20:35:41,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,582 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:41,582 INFO L430 AbstractCegarLoop]: === Iteration 1 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,583 INFO L82 PathProgramCache]: Analyzing trace with hash -559778971, now seen corresponding path program 1 times [2021-06-05 20:35:41,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398143257] [2021-06-05 20:35:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398143257] [2021-06-05 20:35:41,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398143257] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-05 20:35:41,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735729566] [2021-06-05 20:35:41,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:41,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:41,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,602 INFO L87 Difference]: Start difference. First operand has 1403 states, 1399 states have (on average 3.6125804145818443) internal successors, (5054), 1402 states have internal predecessors, (5054), 0 states have call successors, (0), 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 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,618 INFO L93 Difference]: Finished difference Result 398 states and 1386 transitions. [2021-06-05 20:35:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-06-05 20:35:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,620 INFO L225 Difference]: With dead ends: 398 [2021-06-05 20:35:41,620 INFO L226 Difference]: Without dead ends: 374 [2021-06-05 20:35:41,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-06-05 20:35:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 350. [2021-06-05 20:35:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 350 states have (on average 3.5314285714285716) internal successors, (1236), 349 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 1236 transitions. [2021-06-05 20:35:41,627 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 1236 transitions. Word has length 8 [2021-06-05 20:35:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,627 INFO L482 AbstractCegarLoop]: Abstraction has 350 states and 1236 transitions. [2021-06-05 20:35:41,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 1236 transitions. [2021-06-05 20:35:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 20:35:41,628 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,628 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:41,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 20:35:41,628 INFO L430 AbstractCegarLoop]: === Iteration 2 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,628 INFO L82 PathProgramCache]: Analyzing trace with hash 419256713, now seen corresponding path program 1 times [2021-06-05 20:35:41,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003865763] [2021-06-05 20:35:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003865763] [2021-06-05 20:35:41,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003865763] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:35:41,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678202313] [2021-06-05 20:35:41,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:41,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,642 INFO L87 Difference]: Start difference. First operand 350 states and 1236 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,659 INFO L93 Difference]: Finished difference Result 569 states and 1978 transitions. [2021-06-05 20:35:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:41,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-06-05 20:35:41,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,662 INFO L225 Difference]: With dead ends: 569 [2021-06-05 20:35:41,662 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 20:35:41,662 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 20:35:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 359. [2021-06-05 20:35:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 359 states have (on average 3.367688022284123) internal successors, (1209), 358 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1209 transitions. [2021-06-05 20:35:41,671 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1209 transitions. Word has length 12 [2021-06-05 20:35:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,671 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1209 transitions. [2021-06-05 20:35:41,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,671 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1209 transitions. [2021-06-05 20:35:41,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 20:35:41,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,672 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:41,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 20:35:41,672 INFO L430 AbstractCegarLoop]: === Iteration 3 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1014480893, now seen corresponding path program 2 times [2021-06-05 20:35:41,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803098704] [2021-06-05 20:35:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803098704] [2021-06-05 20:35:41,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803098704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:35:41,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690105623] [2021-06-05 20:35:41,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:41,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:41,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,689 INFO L87 Difference]: Start difference. First operand 359 states and 1209 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,703 INFO L93 Difference]: Finished difference Result 461 states and 1548 transitions. [2021-06-05 20:35:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:41,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2021-06-05 20:35:41,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,706 INFO L225 Difference]: With dead ends: 461 [2021-06-05 20:35:41,706 INFO L226 Difference]: Without dead ends: 461 [2021-06-05 20:35:41,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-06-05 20:35:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 415. [2021-06-05 20:35:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 415 states have (on average 3.346987951807229) internal successors, (1389), 414 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1389 transitions. [2021-06-05 20:35:41,714 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1389 transitions. Word has length 12 [2021-06-05 20:35:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,714 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1389 transitions. [2021-06-05 20:35:41,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1389 transitions. [2021-06-05 20:35:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 20:35:41,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,715 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:41,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 20:35:41,715 INFO L430 AbstractCegarLoop]: === Iteration 4 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1957429318, now seen corresponding path program 1 times [2021-06-05 20:35:41,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373313733] [2021-06-05 20:35:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373313733] [2021-06-05 20:35:41,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373313733] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:35:41,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139239424] [2021-06-05 20:35:41,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:41,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:41,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,728 INFO L87 Difference]: Start difference. First operand 415 states and 1389 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,740 INFO L93 Difference]: Finished difference Result 487 states and 1625 transitions. [2021-06-05 20:35:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:41,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-06-05 20:35:41,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,743 INFO L225 Difference]: With dead ends: 487 [2021-06-05 20:35:41,743 INFO L226 Difference]: Without dead ends: 487 [2021-06-05 20:35:41,743 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-06-05 20:35:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 463. [2021-06-05 20:35:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 463 states have (on average 3.32829373650108) internal successors, (1541), 462 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1541 transitions. [2021-06-05 20:35:41,756 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1541 transitions. Word has length 19 [2021-06-05 20:35:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,756 INFO L482 AbstractCegarLoop]: Abstraction has 463 states and 1541 transitions. [2021-06-05 20:35:41,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1541 transitions. [2021-06-05 20:35:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 20:35:41,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,757 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 20:35:41,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 20:35:41,757 INFO L430 AbstractCegarLoop]: === Iteration 5 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash -654209534, now seen corresponding path program 2 times [2021-06-05 20:35:41,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324636039] [2021-06-05 20:35:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324636039] [2021-06-05 20:35:41,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324636039] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 20:35:41,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904895281] [2021-06-05 20:35:41,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 20:35:41,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 20:35:41,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,779 INFO L87 Difference]: Start difference. First operand 463 states and 1541 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,792 INFO L93 Difference]: Finished difference Result 499 states and 1644 transitions. [2021-06-05 20:35:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 20:35:41,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2021-06-05 20:35:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,794 INFO L225 Difference]: With dead ends: 499 [2021-06-05 20:35:41,794 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 20:35:41,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 20:35:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 20:35:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 379. [2021-06-05 20:35:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 379 states have (on average 3.2506596306068603) internal successors, (1232), 378 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1232 transitions. [2021-06-05 20:35:41,805 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1232 transitions. Word has length 19 [2021-06-05 20:35:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,805 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1232 transitions. [2021-06-05 20:35:41,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1232 transitions. [2021-06-05 20:35:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 20:35:41,806 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,806 INFO L554 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] [2021-06-05 20:35:41,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 20:35:41,806 INFO L430 AbstractCegarLoop]: === Iteration 6 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,807 INFO L82 PathProgramCache]: Analyzing trace with hash -2077228235, now seen corresponding path program 1 times [2021-06-05 20:35:41,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539946755] [2021-06-05 20:35:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539946755] [2021-06-05 20:35:41,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539946755] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 20:35:41,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789572942] [2021-06-05 20:35:41,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 20:35:41,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 20:35:41,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 20:35:41,836 INFO L87 Difference]: Start difference. First operand 379 states and 1232 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,858 INFO L93 Difference]: Finished difference Result 398 states and 1273 transitions. [2021-06-05 20:35:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 20:35:41,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-06-05 20:35:41,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,861 INFO L225 Difference]: With dead ends: 398 [2021-06-05 20:35:41,861 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 20:35:41,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:35:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 20:35:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2021-06-05 20:35:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 398 states have (on average 3.198492462311558) internal successors, (1273), 397 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1273 transitions. [2021-06-05 20:35:41,870 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1273 transitions. Word has length 26 [2021-06-05 20:35:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,870 INFO L482 AbstractCegarLoop]: Abstraction has 398 states and 1273 transitions. [2021-06-05 20:35:41,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1273 transitions. [2021-06-05 20:35:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:35:41,871 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,871 INFO L554 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] [2021-06-05 20:35:41,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 20:35:41,871 INFO L430 AbstractCegarLoop]: === Iteration 7 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1176227774, now seen corresponding path program 1 times [2021-06-05 20:35:41,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065712096] [2021-06-05 20:35:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:41,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:41,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065712096] [2021-06-05 20:35:41,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065712096] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:41,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:41,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 20:35:41,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134112724] [2021-06-05 20:35:41,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:35:41,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:35:41,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:35:41,906 INFO L87 Difference]: Start difference. First operand 398 states and 1273 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-06-05 20:35:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:41,971 INFO L93 Difference]: Finished difference Result 468 states and 1460 transitions. [2021-06-05 20:35:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:35:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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 [2021-06-05 20:35:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:41,974 INFO L225 Difference]: With dead ends: 468 [2021-06-05 20:35:41,974 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 20:35:41,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:35:41,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 20:35:41,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2021-06-05 20:35:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 384 states have (on average 3.2083333333333335) internal successors, (1232), 383 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1232 transitions. [2021-06-05 20:35:41,981 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1232 transitions. Word has length 27 [2021-06-05 20:35:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:41,982 INFO L482 AbstractCegarLoop]: Abstraction has 384 states and 1232 transitions. [2021-06-05 20:35:41,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 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) [2021-06-05 20:35:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1232 transitions. [2021-06-05 20:35:41,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 20:35:41,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:41,982 INFO L554 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] [2021-06-05 20:35:41,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 20:35:41,983 INFO L430 AbstractCegarLoop]: === Iteration 8 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:41,983 INFO L82 PathProgramCache]: Analyzing trace with hash 505032694, now seen corresponding path program 2 times [2021-06-05 20:35:41,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:41,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894806995] [2021-06-05 20:35:41,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:42,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:42,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894806995] [2021-06-05 20:35:42,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894806995] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:42,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:42,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 20:35:42,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19040775] [2021-06-05 20:35:42,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 20:35:42,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:42,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 20:35:42,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 20:35:42,007 INFO L87 Difference]: Start difference. First operand 384 states and 1232 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-06-05 20:35:42,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:42,024 INFO L93 Difference]: Finished difference Result 402 states and 1269 transitions. [2021-06-05 20:35:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 20:35:42,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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 [2021-06-05 20:35:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:42,026 INFO L225 Difference]: With dead ends: 402 [2021-06-05 20:35:42,026 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 20:35:42,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 20:35:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 20:35:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2021-06-05 20:35:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 402 states have (on average 3.156716417910448) internal successors, (1269), 401 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:42,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1269 transitions. [2021-06-05 20:35:42,033 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1269 transitions. Word has length 27 [2021-06-05 20:35:42,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:42,033 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1269 transitions. [2021-06-05 20:35:42,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 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) [2021-06-05 20:35:42,034 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1269 transitions. [2021-06-05 20:35:42,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 20:35:42,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 20:35:42,035 INFO L554 BasicCegarLoop]: trace histogram [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] [2021-06-05 20:35:42,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 20:35:42,035 INFO L430 AbstractCegarLoop]: === Iteration 9 === [Process1Err0ASSERT_VIOLATIONASSERT]=== [2021-06-05 20:35:42,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 20:35:42,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2085574249, now seen corresponding path program 3 times [2021-06-05 20:35:42,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 20:35:42,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573044748] [2021-06-05 20:35:42,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 20:35:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 20:35:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 20:35:42,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 20:35:42,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573044748] [2021-06-05 20:35:42,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573044748] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 20:35:42,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 20:35:42,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 20:35:42,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701279916] [2021-06-05 20:35:42,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 20:35:42,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 20:35:42,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 20:35:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 20:35:42,062 INFO L87 Difference]: Start difference. First operand 402 states and 1269 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 20:35:42,126 INFO L93 Difference]: Finished difference Result 244 states and 724 transitions. [2021-06-05 20:35:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 20:35:42,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-06-05 20:35:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 20:35:42,126 INFO L225 Difference]: With dead ends: 244 [2021-06-05 20:35:42,127 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 20:35:42,127 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 20:35:42,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 20:35:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 20:35:42,127 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) [2021-06-05 20:35:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 20:35:42,127 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-06-05 20:35:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 20:35:42,127 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 20:35:42,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 20:35:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 20:35:42,128 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 20:35:42,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 20:35:42,128 INFO L301 ceAbstractionStarter]: Result for error location Process1Thread1of1ForFork1 was SAFE (5/5) [2021-06-05 20:35:42,128 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 20:35:42,130 INFO L202 PluginConnector]: Adding new model Fischer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 08:35:42 BasicIcfg [2021-06-05 20:35:42,130 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 20:35:42,131 INFO L168 Benchmark]: Toolchain (without parser) took 2150.85 ms. Allocated memory is still 346.0 MB. Free memory was 326.1 MB in the beginning and 156.9 MB in the end (delta: 169.2 MB). Peak memory consumption was 171.6 MB. Max. memory is 16.0 GB. [2021-06-05 20:35:42,131 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 346.0 MB. Free memory was 327.2 MB in the beginning and 327.1 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:35:42,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.75 ms. Allocated memory is still 346.0 MB. Free memory was 326.0 MB in the beginning and 324.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 20:35:42,132 INFO L168 Benchmark]: Boogie Preprocessor took 14.69 ms. Allocated memory is still 346.0 MB. Free memory was 324.6 MB in the beginning and 323.6 MB in the end (delta: 977.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 20:35:42,132 INFO L168 Benchmark]: RCFGBuilder took 176.22 ms. Allocated memory is still 346.0 MB. Free memory was 323.5 MB in the beginning and 311.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 20:35:42,133 INFO L168 Benchmark]: TraceAbstraction took 1937.35 ms. Allocated memory is still 346.0 MB. Free memory was 310.7 MB in the beginning and 156.9 MB in the end (delta: 153.8 MB). Peak memory consumption was 156.9 MB. Max. memory is 16.0 GB. [2021-06-05 20:35:42,134 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 0.12 ms. Allocated memory is still 346.0 MB. Free memory was 327.2 MB in the beginning and 327.1 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.75 ms. Allocated memory is still 346.0 MB. Free memory was 326.0 MB in the beginning and 324.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.69 ms. Allocated memory is still 346.0 MB. Free memory was 324.6 MB in the beginning and 323.6 MB in the end (delta: 977.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 176.22 ms. Allocated memory is still 346.0 MB. Free memory was 323.5 MB in the beginning and 311.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1937.35 ms. Allocated memory is still 346.0 MB. Free memory was 310.7 MB in the beginning and 156.9 MB in the end (delta: 153.8 MB). Peak memory consumption was 156.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 78]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 57]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process2Thread1of1ForFork2 with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1141.9ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 19.1ms, AutomataDifference: 466.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 107.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 405 SDtfs, 271 SDslu, 361 SDs, 0 SdLazy, 210 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 192.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 127.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 136.4ms AutomataMinimizationTime, 9 MinimizatonAttempts, 232 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 12.2ms SsaConstructionTime, 62.2ms SatisfiabilityAnalysisTime, 207.8ms InterpolantComputationTime, 179 NumberOfCodeBlocks, 179 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 170 ConstructedInterpolants, 0 QuantifiedInterpolants, 426 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 1/1 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 - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process2 with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 42.6ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 5.8ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process1 with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 40.5ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 5.7ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 34.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 52.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 6.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 45.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: Process1Thread1of1ForFork1 with 1 thread instances CFG has 7 procedures, 78 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 572.3ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 7.3ms, AutomataDifference: 270.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 25.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 405 SDtfs, 274 SDslu, 361 SDs, 0 SdLazy, 210 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 106.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 101.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1403occurred in iteration=0, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 67.8ms AutomataMinimizationTime, 9 MinimizatonAttempts, 232 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.7ms SsaConstructionTime, 22.2ms SatisfiabilityAnalysisTime, 133.8ms InterpolantComputationTime, 178 NumberOfCodeBlocks, 178 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 419 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 1/1 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...