/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/eqn5f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:56:20,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:56:20,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:56:20,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:56:20,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:56:20,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:56:20,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:56:20,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:56:20,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:56:20,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:56:20,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:56:20,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:56:20,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:56:20,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:56:20,780 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:56:20,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:56:20,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:56:20,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:56:20,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:56:20,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:56:20,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:56:20,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:56:20,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:56:20,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:56:20,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:56:20,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:56:20,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:56:20,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:56:20,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:56:20,863 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:56:20,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:56:20,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:56:20,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:56:20,865 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:56:20,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:56:20,866 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:56:20,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:56:20,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:56:20,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:56:20,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:56:20,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:56:20,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:56:20,868 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:56:20,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:56:20,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:56:20,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:56:20,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:56:20,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:56:20,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:56:20,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:56:20,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:56:20,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:56:20,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:56:20,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:56:20,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:56:20,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:56:20,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:56:20,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:56:20,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:56:21,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:56:21,188 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:56:21,191 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:56:21,192 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:56:21,193 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:56:21,193 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn5f.c [2020-08-22 16:56:21,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caaa45254/0608d77bdb8543489a47e033cb93a44c/FLAGd23a530cf [2020-08-22 16:56:21,651 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:56:21,651 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn5f.c [2020-08-22 16:56:21,658 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caaa45254/0608d77bdb8543489a47e033cb93a44c/FLAGd23a530cf [2020-08-22 16:56:22,028 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caaa45254/0608d77bdb8543489a47e033cb93a44c [2020-08-22 16:56:22,036 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:56:22,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:56:22,039 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:22,039 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:56:22,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:56:22,043 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:22" (1/1) ... [2020-08-22 16:56:22,046 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e093328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22, skipping insertion in model container [2020-08-22 16:56:22,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:56:22" (1/1) ... [2020-08-22 16:56:22,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:56:22,071 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:56:22,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:22,262 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:56:22,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:56:22,300 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:56:22,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22 WrapperNode [2020-08-22 16:56:22,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:56:22,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:56:22,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:56:22,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:56:22,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22" (1/1) ... [2020-08-22 16:56:22,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22" (1/1) ... [2020-08-22 16:56:22,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22" (1/1) ... [2020-08-22 16:56:22,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22" (1/1) ... [2020-08-22 16:56:22,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22" (1/1) ... [2020-08-22 16:56:22,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22" (1/1) ... [2020-08-22 16:56:22,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22" (1/1) ... [2020-08-22 16:56:22,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:56:22,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:56:22,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:56:22,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:56:22,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22" (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 [2020-08-22 16:56:22,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:56:22,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:56:22,523 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 16:56:22,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 16:56:22,523 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:56:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:56:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 16:56:22,523 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 16:56:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 16:56:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:56:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 16:56:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:56:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 16:56:22,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 16:56:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 16:56:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:56:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:56:22,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 16:56:22,788 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:56:22,788 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 16:56:22,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:22 BoogieIcfgContainer [2020-08-22 16:56:22,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:56:22,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:56:22,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:56:22,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:56:22,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:56:22" (1/3) ... [2020-08-22 16:56:22,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4496609f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:22, skipping insertion in model container [2020-08-22 16:56:22,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:56:22" (2/3) ... [2020-08-22 16:56:22,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4496609f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:56:22, skipping insertion in model container [2020-08-22 16:56:22,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:56:22" (3/3) ... [2020-08-22 16:56:22,800 INFO L109 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2020-08-22 16:56:22,812 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:56:22,818 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:56:22,832 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:56:22,857 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:56:22,858 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:56:22,858 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:56:22,858 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:56:22,858 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:56:22,858 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:56:22,858 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:56:22,859 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:56:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-22 16:56:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:22,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:22,884 INFO L422 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] [2020-08-22 16:56:22,885 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:22,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:22,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-08-22 16:56:22,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:22,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172086985] [2020-08-22 16:56:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:56:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:56:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:23,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172086985] [2020-08-22 16:56:23,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:23,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 16:56:23,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387613748] [2020-08-22 16:56:23,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 16:56:23,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:23,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 16:56:23,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:23,130 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-08-22 16:56:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:23,239 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-08-22 16:56:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 16:56:23,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 16:56:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:23,250 INFO L225 Difference]: With dead ends: 58 [2020-08-22 16:56:23,250 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 16:56:23,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 16:56:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 16:56:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-08-22 16:56:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 16:56:23,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-08-22 16:56:23,298 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-08-22 16:56:23,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:23,298 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-08-22 16:56:23,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 16:56:23,299 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-08-22 16:56:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 16:56:23,300 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:23,300 INFO L422 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] [2020-08-22 16:56:23,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:56:23,301 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:23,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:23,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-08-22 16:56:23,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:23,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442871119] [2020-08-22 16:56:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:23,328 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:23,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1385809261] [2020-08-22 16:56:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:23,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:56:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:23,502 INFO L350 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-08-22 16:56:23,503 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2020-08-22 16:56:23,504 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:23,509 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:23,515 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:56:23,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:15 [2020-08-22 16:56:23,561 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:23,561 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-08-22 16:56:23,563 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-08-22 16:56:23,575 INFO L625 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-08-22 16:56:23,575 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:23,576 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-08-22 16:56:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:23,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442871119] [2020-08-22 16:56:23,624 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:23,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385809261] [2020-08-22 16:56:23,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:23,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:56:23,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83782745] [2020-08-22 16:56:23,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:56:23,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:23,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:56:23,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:56:23,630 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 7 states. [2020-08-22 16:56:23,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:23,798 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-08-22 16:56:23,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:56:23,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 16:56:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:23,803 INFO L225 Difference]: With dead ends: 47 [2020-08-22 16:56:23,803 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 16:56:23,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:56:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 16:56:23,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-08-22 16:56:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 16:56:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-22 16:56:23,821 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 22 [2020-08-22 16:56:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:23,821 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-22 16:56:23,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:56:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-22 16:56:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:56:23,823 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:23,823 INFO L422 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] [2020-08-22 16:56:24,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:56:24,039 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:24,042 INFO L82 PathProgramCache]: Analyzing trace with hash -2104565367, now seen corresponding path program 1 times [2020-08-22 16:56:24,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:24,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934276610] [2020-08-22 16:56:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:24,088 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:24,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426561016] [2020-08-22 16:56:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:24,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:56:24,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:24,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934276610] [2020-08-22 16:56:24,193 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:24,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426561016] [2020-08-22 16:56:24,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:56:24,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:56:24,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829534663] [2020-08-22 16:56:24,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:56:24,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:24,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:56:24,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:56:24,196 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 5 states. [2020-08-22 16:56:24,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:24,289 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-08-22 16:56:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:56:24,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-22 16:56:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:24,293 INFO L225 Difference]: With dead ends: 71 [2020-08-22 16:56:24,293 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 16:56:24,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:56:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 16:56:24,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2020-08-22 16:56:24,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 16:56:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-08-22 16:56:24,303 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 24 [2020-08-22 16:56:24,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:24,304 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-08-22 16:56:24,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:56:24,304 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-08-22 16:56:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 16:56:24,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:24,305 INFO L422 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] [2020-08-22 16:56:24,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:24,518 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:24,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:24,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2011180599, now seen corresponding path program 1 times [2020-08-22 16:56:24,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:24,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133613224] [2020-08-22 16:56:24,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:24,540 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:24,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130389420] [2020-08-22 16:56:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:24,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-08-22 16:56:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:24,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133613224] [2020-08-22 16:56:24,626 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:24,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130389420] [2020-08-22 16:56:24,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:24,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 16:56:24,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125905984] [2020-08-22 16:56:24,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:56:24,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:56:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:56:24,630 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2020-08-22 16:56:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:56:24,730 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-08-22 16:56:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:56:24,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-22 16:56:24,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:56:24,732 INFO L225 Difference]: With dead ends: 66 [2020-08-22 16:56:24,732 INFO L226 Difference]: Without dead ends: 55 [2020-08-22 16:56:24,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:56:24,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-22 16:56:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2020-08-22 16:56:24,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 16:56:24,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-08-22 16:56:24,741 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2020-08-22 16:56:24,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:56:24,742 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-08-22 16:56:24,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:56:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-08-22 16:56:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 16:56:24,743 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:56:24,743 INFO L422 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] [2020-08-22 16:56:24,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:24,957 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:56:24,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:56:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-08-22 16:56:24,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:56:24,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216242762] [2020-08-22 16:56:24,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:56:24,977 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:56:24,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955797325] [2020-08-22 16:56:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:56:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:56:25,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2020-08-22 16:56:25,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:56:25,051 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-08-22 16:56:25,053 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:25,059 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:25,067 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-08-22 16:56:25,067 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:25,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:25,074 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:25,075 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-08-22 16:56:25,138 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-08-22 16:56:25,138 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-08-22 16:56:25,143 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:25,183 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-08-22 16:56:25,185 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:56:25,189 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-08-22 16:56:25,190 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-08-22 16:56:25,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:56:25,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:56:25,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:56:25,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:56:25,370 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-08-22 16:56:25,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:56:25,398 INFO L441 ElimStorePlain]: Different costs {12=[v_prenex_2], 20=[|v_#memory_int_14|]} [2020-08-22 16:56:25,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:56:25,409 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-08-22 16:56:25,409 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2020-08-22 16:56:25,411 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:25,451 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:56:25,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:56:25,484 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-08-22 16:56:25,485 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 85 [2020-08-22 16:56:25,487 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:25,561 INFO L625 ElimStorePlain]: treesize reduction 50, result has 69.7 percent of original size [2020-08-22 16:56:25,571 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2020-08-22 16:56:25,572 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:115 [2020-08-22 16:56:26,478 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-08-22 16:56:27,843 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 51 [2020-08-22 16:56:27,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:56:27,882 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:56:27,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:56:27,884 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:56:27,889 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-08-22 16:56:27,889 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 18 [2020-08-22 16:56:27,890 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,936 INFO L350 Elim1Store]: treesize reduction 27, result has 65.8 percent of original size [2020-08-22 16:56:27,937 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 71 [2020-08-22 16:56:27,939 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-08-22 16:56:27,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:56:27,941 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,980 INFO L625 ElimStorePlain]: treesize reduction 41, result has 35.9 percent of original size [2020-08-22 16:56:27,985 INFO L545 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:56:27,986 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:138, output treesize:7 [2020-08-22 16:56:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:56:28,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216242762] [2020-08-22 16:56:28,067 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:56:28,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955797325] [2020-08-22 16:56:28,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:56:28,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 16:56:28,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229757900] [2020-08-22 16:56:28,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:56:28,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:56:28,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:56:28,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:56:28,070 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2020-08-22 16:56:40,798 WARN L193 SmtUtils]: Spent 4.23 s on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-08-22 16:56:50,245 WARN L193 SmtUtils]: Spent 9.35 s on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-08-22 16:56:54,744 WARN L193 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-08-22 16:56:59,354 WARN L193 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-08-22 16:57:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:10,907 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-08-22 16:57:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:57:10,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-08-22 16:57:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:10,922 INFO L225 Difference]: With dead ends: 69 [2020-08-22 16:57:10,922 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 16:57:10,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:57:10,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 16:57:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2020-08-22 16:57:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 16:57:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-08-22 16:57:10,944 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 26 [2020-08-22 16:57:10,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:10,945 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-08-22 16:57:10,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:57:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-08-22 16:57:10,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:57:10,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:10,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:11,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:11,148 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1499578309, now seen corresponding path program 2 times [2020-08-22 16:57:11,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:11,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104535733] [2020-08-22 16:57:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:11,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:11,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:57:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:11,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104535733] [2020-08-22 16:57:11,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672419719] [2020-08-22 16:57:11,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:11,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:57:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:57:11,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:11,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:11,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-08-22 16:57:11,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884881241] [2020-08-22 16:57:11,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:57:11,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:11,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:57:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:57:11,434 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 10 states. [2020-08-22 16:57:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:11,918 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-08-22 16:57:11,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:57:11,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 16:57:11,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:11,925 INFO L225 Difference]: With dead ends: 84 [2020-08-22 16:57:11,925 INFO L226 Difference]: Without dead ends: 71 [2020-08-22 16:57:11,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:57:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-08-22 16:57:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2020-08-22 16:57:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 16:57:11,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-22 16:57:11,941 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 28 [2020-08-22 16:57:11,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:11,942 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-22 16:57:11,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:57:11,942 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-22 16:57:11,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 16:57:11,947 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:11,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:12,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:57:12,164 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1048027141, now seen corresponding path program 3 times [2020-08-22 16:57:12,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:12,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127057454] [2020-08-22 16:57:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:12,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:57:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:12,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:57:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:12,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127057454] [2020-08-22 16:57:12,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466176310] [2020-08-22 16:57:12,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:12,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-08-22 16:57:12,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:12,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:57:12,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:12,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:57:12,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-08-22 16:57:12,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682895367] [2020-08-22 16:57:12,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 16:57:12,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:12,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 16:57:12,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:57:12,345 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 10 states. [2020-08-22 16:57:12,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:12,893 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-08-22 16:57:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:57:12,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 16:57:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:12,897 INFO L225 Difference]: With dead ends: 79 [2020-08-22 16:57:12,897 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 16:57:12,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:57:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 16:57:12,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 47. [2020-08-22 16:57:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 16:57:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-08-22 16:57:12,920 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 28 [2020-08-22 16:57:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:12,921 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-08-22 16:57:12,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 16:57:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-08-22 16:57:12,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 16:57:12,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:12,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:13,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:13,141 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:13,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:13,142 INFO L82 PathProgramCache]: Analyzing trace with hash 913238305, now seen corresponding path program 1 times [2020-08-22 16:57:13,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:13,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070326043] [2020-08-22 16:57:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:13,152 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:13,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [379397832] [2020-08-22 16:57:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:13,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:57:13,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2020-08-22 16:57:13,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:13,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:13,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070326043] [2020-08-22 16:57:13,251 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:13,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379397832] [2020-08-22 16:57:13,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:57:13,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 16:57:13,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83576924] [2020-08-22 16:57:13,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 16:57:13,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:13,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 16:57:13,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 16:57:13,254 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2020-08-22 16:57:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:57:13,398 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2020-08-22 16:57:13,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 16:57:13,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-08-22 16:57:13,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:57:13,399 INFO L225 Difference]: With dead ends: 72 [2020-08-22 16:57:13,400 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 16:57:13,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:57:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 16:57:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-08-22 16:57:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 16:57:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-08-22 16:57:13,407 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 30 [2020-08-22 16:57:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:57:13,408 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-08-22 16:57:13,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 16:57:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-08-22 16:57:13,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 16:57:13,409 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:57:13,409 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:57:13,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:13,617 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:57:13,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:57:13,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2071122883, now seen corresponding path program 4 times [2020-08-22 16:57:13,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:57:13,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269224399] [2020-08-22 16:57:13,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:57:13,634 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:57:13,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767875922] [2020-08-22 16:57:13,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:57:13,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:57:13,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:57:13,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2020-08-22 16:57:13,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:57:13,704 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-08-22 16:57:13,706 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:13,712 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:13,723 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-08-22 16:57:13,723 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:13,729 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:13,730 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-08-22 16:57:13,730 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-08-22 16:57:13,863 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-08-22 16:57:13,864 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-08-22 16:57:13,864 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-08-22 16:57:13,866 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:13,952 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-08-22 16:57:13,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:13,954 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-08-22 16:57:13,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-08-22 16:57:13,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:14,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:14,071 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:14,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:14,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:14,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:14,279 INFO L244 Elim1Store]: Index analysis took 176 ms [2020-08-22 16:57:14,363 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:14,363 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 143 [2020-08-22 16:57:14,365 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-08-22 16:57:14,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:57:14,366 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-08-22 16:57:14,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:57:14,367 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-08-22 16:57:14,367 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:14,371 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:14,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:14,768 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-08-22 16:57:14,769 INFO L350 Elim1Store]: treesize reduction 17, result has 92.5 percent of original size [2020-08-22 16:57:14,769 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 63 treesize of output 252 [2020-08-22 16:57:14,773 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[6, 2, 1] term [2020-08-22 16:57:14,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-08-22 16:57:14,775 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[5, 2, 1] term [2020-08-22 16:57:14,775 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-08-22 16:57:14,776 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-08-22 16:57:14,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:57:14,777 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-08-22 16:57:14,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:57:14,778 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-08-22 16:57:14,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:14,791 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:15,245 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 47 [2020-08-22 16:57:15,246 INFO L625 ElimStorePlain]: treesize reduction 805, result has 14.5 percent of original size [2020-08-22 16:57:15,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:15,250 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-08-22 16:57:15,250 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:121, output treesize:101 [2020-08-22 16:57:15,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:15,448 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-08-22 16:57:15,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:15,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:15,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:16,197 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-08-22 16:57:16,200 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-08-22 16:57:16,240 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:16,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:16,248 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:16,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:16,254 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:16,310 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:16,346 INFO L244 Elim1Store]: Index analysis took 106 ms [2020-08-22 16:57:16,350 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2020-08-22 16:57:16,351 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:16,381 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:16,382 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:16,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:16,390 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:16,427 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:16,470 INFO L350 Elim1Store]: treesize reduction 17, result has 67.9 percent of original size [2020-08-22 16:57:16,470 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 107 [2020-08-22 16:57:16,474 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:16,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:16,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:16,504 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:16,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:16,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:16,514 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 64 [2020-08-22 16:57:16,515 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:16,881 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-08-22 16:57:16,882 INFO L625 ElimStorePlain]: treesize reduction 71, result has 78.1 percent of original size [2020-08-22 16:57:16,883 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 3 xjuncts. [2020-08-22 16:57:16,884 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:212, output treesize:253 [2020-08-22 16:57:17,337 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-08-22 16:57:17,340 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 3, 6, 1] term [2020-08-22 16:57:17,340 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-08-22 16:57:17,696 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-08-22 16:57:17,699 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-08-22 16:57:17,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:17,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,261 INFO L244 Elim1Store]: Index analysis took 518 ms [2020-08-22 16:57:18,284 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:18,285 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 107 [2020-08-22 16:57:18,286 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:18,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,741 INFO L244 Elim1Store]: Index analysis took 419 ms [2020-08-22 16:57:18,769 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-08-22 16:57:18,770 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 100 [2020-08-22 16:57:18,771 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:18,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:18,936 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-08-22 16:57:18,936 INFO L350 Elim1Store]: treesize reduction 17, result has 81.7 percent of original size [2020-08-22 16:57:18,937 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 177 [2020-08-22 16:57:18,939 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:19,459 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-08-22 16:57:19,459 INFO L625 ElimStorePlain]: treesize reduction 231, result has 55.5 percent of original size [2020-08-22 16:57:19,473 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 3 xjuncts. [2020-08-22 16:57:19,473 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:285, output treesize:288 [2020-08-22 16:57:21,633 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 103 [2020-08-22 16:57:26,045 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 107 [2020-08-22 16:57:26,051 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-08-22 16:57:26,120 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:26,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,131 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:26,243 INFO L350 Elim1Store]: treesize reduction 10, result has 81.5 percent of original size [2020-08-22 16:57:26,244 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 65 [2020-08-22 16:57:26,245 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-08-22 16:57:26,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,257 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:26,280 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:26,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,301 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:26,574 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2020-08-22 16:57:26,575 INFO L350 Elim1Store]: treesize reduction 17, result has 84.0 percent of original size [2020-08-22 16:57:26,575 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 96 treesize of output 113 [2020-08-22 16:57:26,577 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[4, 2, 1] term [2020-08-22 16:57:26,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:57:26,578 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-08-22 16:57:26,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:57:26,579 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-08-22 16:57:26,580 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,581 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,582 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:57:26,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:57:26,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-08-22 16:57:26,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:57:26,608 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-08-22 16:57:26,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-08-22 16:57:26,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,612 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 3, 1] term [2020-08-22 16:57:26,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,614 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-08-22 16:57:26,635 INFO L173 IndexEqualityManager]: detected equality via solver [2020-08-22 16:57:26,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-08-22 16:57:26,819 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-08-22 16:57:26,820 INFO L350 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2020-08-22 16:57:26,820 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 94 treesize of output 82 [2020-08-22 16:57:26,824 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 1] term [2020-08-22 16:57:26,824 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,832 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,833 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-08-22 16:57:26,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,838 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,838 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-08-22 16:57:26,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,841 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,843 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,843 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-08-22 16:57:26,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-08-22 16:57:26,847 INFO L545 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-08-22 16:57:26,983 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 31 [2020-08-22 16:57:26,983 INFO L625 ElimStorePlain]: treesize reduction 395, result has 10.6 percent of original size [2020-08-22 16:57:26,988 INFO L545 ElimStorePlain]: Start of recursive call 1: 12 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-08-22 16:57:26,988 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 13 variables, input treesize:303, output treesize:19 [2020-08-22 16:57:27,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:57:27,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269224399] [2020-08-22 16:57:27,242 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:57:27,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767875922] [2020-08-22 16:57:27,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:57:27,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 16:57:27,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43968465] [2020-08-22 16:57:27,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:57:27,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:57:27,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:57:27,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2020-08-22 16:57:27,244 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 13 states. [2020-08-22 16:57:27,952 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2020-08-22 16:57:30,500 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2020-08-22 16:57:31,157 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-08-22 16:57:40,626 WARN L193 SmtUtils]: Spent 8.56 s on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2020-08-22 16:57:45,307 WARN L193 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 146 DAG size of output: 127 [2020-08-22 16:57:52,601 WARN L193 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 148 DAG size of output: 129 [2020-08-22 16:58:01,889 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2020-08-22 16:58:06,977 WARN L193 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 119 DAG size of output: 119 [2020-08-22 16:58:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:09,949 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-08-22 16:58:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:58:09,958 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-08-22 16:58:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:09,960 INFO L225 Difference]: With dead ends: 77 [2020-08-22 16:58:09,960 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 16:58:09,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=79, Invalid=381, Unknown=2, NotChecked=0, Total=462 [2020-08-22 16:58:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 16:58:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-08-22 16:58:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 16:58:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-08-22 16:58:09,977 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 30 [2020-08-22 16:58:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:09,977 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-08-22 16:58:09,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:58:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-08-22 16:58:09,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 16:58:09,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:09,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:10,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-08-22 16:58:10,182 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:10,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:10,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1569644609, now seen corresponding path program 5 times [2020-08-22 16:58:10,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:10,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330548186] [2020-08-22 16:58:10,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:10,200 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:58:10,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054125630] [2020-08-22 16:58:10,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:10,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-08-22 16:58:10,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:58:10,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:58:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:58:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:58:10,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330548186] [2020-08-22 16:58:10,329 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-08-22 16:58:10,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054125630] [2020-08-22 16:58:10,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 16:58:10,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 16:58:10,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986394882] [2020-08-22 16:58:10,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:58:10,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:58:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:58:10,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:58:10,331 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 9 states. [2020-08-22 16:58:11,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:58:11,005 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-08-22 16:58:11,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:58:11,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-08-22 16:58:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:58:11,013 INFO L225 Difference]: With dead ends: 100 [2020-08-22 16:58:11,014 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 16:58:11,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:58:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 16:58:11,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2020-08-22 16:58:11,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-22 16:58:11,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2020-08-22 16:58:11,025 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2020-08-22 16:58:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:58:11,026 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2020-08-22 16:58:11,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:58:11,026 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2020-08-22 16:58:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 16:58:11,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:58:11,027 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:58:11,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:11,237 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:58:11,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:58:11,238 INFO L82 PathProgramCache]: Analyzing trace with hash 890841693, now seen corresponding path program 1 times [2020-08-22 16:58:11,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:58:11,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885903847] [2020-08-22 16:58:11,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:58:11,248 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-22 16:58:11,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546298097] [2020-08-22 16:58:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:58:11,283 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:58:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:58:11,298 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:58:11,320 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:58:11,321 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:58:11,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:58:11,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:58:11 BoogieIcfgContainer [2020-08-22 16:58:11,580 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:58:11,582 INFO L168 Benchmark]: Toolchain (without parser) took 109544.41 ms. Allocated memory was 145.2 MB in the beginning and 296.2 MB in the end (delta: 151.0 MB). Free memory was 100.9 MB in the beginning and 123.6 MB in the end (delta: -22.8 MB). Peak memory consumption was 128.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:11,582 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:58:11,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.98 ms. Allocated memory is still 145.2 MB. Free memory was 100.7 MB in the beginning and 90.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:11,584 INFO L168 Benchmark]: Boogie Preprocessor took 161.98 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.3 MB in the beginning and 179.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:11,585 INFO L168 Benchmark]: RCFGBuilder took 328.65 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 162.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:11,590 INFO L168 Benchmark]: TraceAbstraction took 108786.87 ms. Allocated memory was 202.4 MB in the beginning and 296.2 MB in the end (delta: 93.8 MB). Free memory was 162.3 MB in the beginning and 123.6 MB in the end (delta: 38.6 MB). Peak memory consumption was 132.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:58:11,592 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 119.8 MB in the beginning and 119.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 261.98 ms. Allocated memory is still 145.2 MB. Free memory was 100.7 MB in the beginning and 90.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 161.98 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 90.3 MB in the beginning and 179.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 328.65 ms. Allocated memory is still 202.4 MB. Free memory was 179.5 MB in the beginning and 162.3 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 108786.87 ms. Allocated memory was 202.4 MB in the beginning and 296.2 MB in the end (delta: 93.8 MB). Free memory was 162.3 MB in the beginning and 123.6 MB in the end (delta: 38.6 MB). Peak memory consumption was 132.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=4, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] a[0] = 1 [L30] b[0] = 1 [L31] i=1 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=1, malloc(sizeof(long long)*N)={-1:0}, malloc(sizeof(long long)*N)={-2:0}, N=2] [L31] COND TRUE i