/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:37:24,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:37:24,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:37:24,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:37:24,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:37:24,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:37:24,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:37:24,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:37:24,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:37:24,110 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:37:24,112 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:37:24,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:37:24,120 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:37:24,121 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:37:24,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:37:24,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:37:24,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:37:24,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:37:24,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:37:24,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:37:24,144 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 [2021-05-06 03:37:24,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:37:24,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:37:24,188 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:37:24,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:37:24,188 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:37:24,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:37:24,189 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:37:24,189 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:37:24,189 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:37:24,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:37:24,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:37:24,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:37:24,190 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:37:24,190 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:37:24,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:37:24,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:37:24,191 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:37:24,191 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:37:24,191 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:37:24,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:37:24,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:37:24,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:37:24,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:37:24,217 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:37:24,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:37:24,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:37:24,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:37:24,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:37:24,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:37:24,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:37:24,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:37:24,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:37:24,564 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:37:24,564 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:37:24,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2021-05-06 03:37:24,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aaf4e45a/e071cab978754f1aafed3c63d5209db7/FLAG5e800e1aa [2021-05-06 03:37:25,115 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:37:25,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c [2021-05-06 03:37:25,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aaf4e45a/e071cab978754f1aafed3c63d5209db7/FLAG5e800e1aa [2021-05-06 03:37:25,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8aaf4e45a/e071cab978754f1aafed3c63d5209db7 [2021-05-06 03:37:25,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:37:25,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:37:25,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:37:25,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:37:25,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:37:25,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:37:25" (1/1) ... [2021-05-06 03:37:25,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37535c66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25, skipping insertion in model container [2021-05-06 03:37:25,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:37:25" (1/1) ... [2021-05-06 03:37:25,556 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:37:25,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:37:25,811 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2021-05-06 03:37:25,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:37:25,855 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:37:25,881 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound2.c[526,539] [2021-05-06 03:37:25,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:37:25,947 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:37:25,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25 WrapperNode [2021-05-06 03:37:25,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:37:25,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:37:25,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:37:25,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:37:25,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25" (1/1) ... [2021-05-06 03:37:25,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25" (1/1) ... [2021-05-06 03:37:26,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25" (1/1) ... [2021-05-06 03:37:26,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25" (1/1) ... [2021-05-06 03:37:26,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25" (1/1) ... [2021-05-06 03:37:26,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25" (1/1) ... [2021-05-06 03:37:26,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25" (1/1) ... [2021-05-06 03:37:26,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:37:26,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:37:26,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:37:26,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:37:26,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:37:26,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:37:26,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:37:26,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:37:26,109 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:37:26,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:37:26,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:37:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:37:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:37:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:37:26,110 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:37:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 03:37:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:37:26,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:37:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:37:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:37:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:37:26,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:37:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:37:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:37:26,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:37:26,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:37:26,460 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:37:26,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:37:26 BoogieIcfgContainer [2021-05-06 03:37:26,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:37:26,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:37:26,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:37:26,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:37:26,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:37:25" (1/3) ... [2021-05-06 03:37:26,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e313dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:37:26, skipping insertion in model container [2021-05-06 03:37:26,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:37:25" (2/3) ... [2021-05-06 03:37:26,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47e313dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:37:26, skipping insertion in model container [2021-05-06 03:37:26,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:37:26" (3/3) ... [2021-05-06 03:37:26,474 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound2.c [2021-05-06 03:37:26,480 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:37:26,484 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:37:26,499 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:37:26,530 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:37:26,530 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:37:26,530 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:37:26,530 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:37:26,530 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:37:26,530 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:37:26,531 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:37:26,531 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:37:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:37:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:37:26,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:26,560 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:26,560 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:26,565 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-06 03:37:26,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:26,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478577641] [2021-05-06 03:37:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:26,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:37:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:26,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:37:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:37:26,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:26,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478577641] [2021-05-06 03:37:26,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478577641] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:37:26,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:37:26,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:37:26,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629852447] [2021-05-06 03:37:26,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:37:26,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:26,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:37:26,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:37:26,795 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:37:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:26,907 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-06 03:37:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:37:26,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 03:37:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:26,916 INFO L225 Difference]: With dead ends: 61 [2021-05-06 03:37:26,916 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 03:37:26,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:37:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 03:37:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 03:37:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:37:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 03:37:26,978 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 03:37:26,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:26,978 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 03:37:26,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:37:26,979 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 03:37:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 03:37:26,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:26,985 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:26,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:37:26,985 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-06 03:37:26,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:26,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550442075] [2021-05-06 03:37:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:27,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:37:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:27,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:37:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:27,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:37:27,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:27,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550442075] [2021-05-06 03:37:27,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550442075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:37:27,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:37:27,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:37:27,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873652773] [2021-05-06 03:37:27,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:37:27,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:27,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:37:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:37:27,187 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:37:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:27,557 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-06 03:37:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:37:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 03:37:27,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:27,560 INFO L225 Difference]: With dead ends: 43 [2021-05-06 03:37:27,560 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 03:37:27,563 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:37:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 03:37:27,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 03:37:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:37:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 03:37:27,592 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 03:37:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:27,597 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 03:37:27,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:37:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 03:37:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 03:37:27,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:27,599 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:27,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:37:27,600 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:27,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-06 03:37:27,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:27,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251457148] [2021-05-06 03:37:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:27,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:27,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:37:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:27,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:37:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:27,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 03:37:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:37:27,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:27,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251457148] [2021-05-06 03:37:27,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251457148] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:37:27,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:37:27,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:37:27,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008385535] [2021-05-06 03:37:27,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:37:27,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:27,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:37:27,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:37:27,726 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:37:28,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:28,056 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-06 03:37:28,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:37:28,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 03:37:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:28,059 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:37:28,059 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:37:28,060 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:37:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:37:28,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 03:37:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:37:28,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 03:37:28,077 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 03:37:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:28,077 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 03:37:28,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:37:28,077 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 03:37:28,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 03:37:28,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:28,079 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:28,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:37:28,079 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:28,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-06 03:37:28,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:28,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875335489] [2021-05-06 03:37:28,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:28,113 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:28,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936789106] [2021-05-06 03:37:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:37:28,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:28,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:37:28,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:28,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875335489] [2021-05-06 03:37:28,409 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:28,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936789106] [2021-05-06 03:37:28,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936789106] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:37:28,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:37:28,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:37:28,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640151392] [2021-05-06 03:37:28,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:37:28,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:28,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:37:28,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:37:28,411 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:37:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:28,508 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2021-05-06 03:37:28,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:37:28,509 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 03:37:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:28,510 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:37:28,510 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 03:37:28,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:37:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 03:37:28,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 03:37:28,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:37:28,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 03:37:28,521 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 03:37:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:28,521 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 03:37:28,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:37:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 03:37:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 03:37:28,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:28,523 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:28,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:28,737 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:28,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:28,738 INFO L82 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2021-05-06 03:37:28,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:28,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333772214] [2021-05-06 03:37:28,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:28,747 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:28,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423872817] [2021-05-06 03:37:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:37:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:29,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:37:29,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:29,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333772214] [2021-05-06 03:37:29,082 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:29,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423872817] [2021-05-06 03:37:29,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423872817] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:37:29,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:37:29,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:37:29,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899686429] [2021-05-06 03:37:29,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:37:29,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:29,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:37:29,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:37:29,084 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:37:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:29,179 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-05-06 03:37:29,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:37:29,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 03:37:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:29,183 INFO L225 Difference]: With dead ends: 65 [2021-05-06 03:37:29,183 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:37:29,184 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:37:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:37:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 03:37:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 03:37:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 03:37:29,194 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 03:37:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:29,195 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 03:37:29,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:37:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 03:37:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 03:37:29,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:29,196 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:29,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:29,415 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:29,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2021-05-06 03:37:29,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:29,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354318623] [2021-05-06 03:37:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:29,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:29,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972870312] [2021-05-06 03:37:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:29,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:37:29,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:29,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:37:29,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:29,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354318623] [2021-05-06 03:37:29,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:29,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972870312] [2021-05-06 03:37:29,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972870312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:37:29,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:37:29,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:37:29,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982120735] [2021-05-06 03:37:29,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:37:29,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:29,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:37:29,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:37:29,678 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:37:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:29,809 INFO L93 Difference]: Finished difference Result 105 states and 141 transitions. [2021-05-06 03:37:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:37:29,809 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 03:37:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:29,812 INFO L225 Difference]: With dead ends: 105 [2021-05-06 03:37:29,812 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 03:37:29,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:37:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 03:37:29,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 03:37:29,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:37:29,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 03:37:29,826 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 03:37:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:29,827 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 03:37:29,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:37:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 03:37:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 03:37:29,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:29,829 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:30,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:30,057 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1230656439, now seen corresponding path program 2 times [2021-05-06 03:37:30,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:30,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339248028] [2021-05-06 03:37:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:30,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:30,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829303471] [2021-05-06 03:37:30,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:30,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:37:30,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:37:30,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:37:30,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:30,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 03:37:30,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:30,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339248028] [2021-05-06 03:37:30,299 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:30,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829303471] [2021-05-06 03:37:30,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829303471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:37:30,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:37:30,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:37:30,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783516657] [2021-05-06 03:37:30,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:37:30,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:30,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:37:30,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:37:30,301 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:37:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:30,455 INFO L93 Difference]: Finished difference Result 134 states and 185 transitions. [2021-05-06 03:37:30,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:37:30,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 03:37:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:30,457 INFO L225 Difference]: With dead ends: 134 [2021-05-06 03:37:30,457 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 03:37:30,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:37:30,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 03:37:30,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 03:37:30,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 62 states have internal predecessors, (68), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:37:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2021-05-06 03:37:30,475 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 61 [2021-05-06 03:37:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:30,475 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2021-05-06 03:37:30,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:37:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2021-05-06 03:37:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 03:37:30,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:30,477 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 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] [2021-05-06 03:37:30,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:30,701 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:30,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:30,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2021-05-06 03:37:30,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:30,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558203956] [2021-05-06 03:37:30,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:30,710 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:30,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773373313] [2021-05-06 03:37:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:30,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 03:37:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:30,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 03:37:30,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:30,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558203956] [2021-05-06 03:37:30,983 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:30,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773373313] [2021-05-06 03:37:30,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773373313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:37:30,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:37:30,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:37:30,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330374636] [2021-05-06 03:37:30,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:37:30,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:30,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:37:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:37:30,985 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 03:37:31,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:31,118 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2021-05-06 03:37:31,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:37:31,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-06 03:37:31,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:31,120 INFO L225 Difference]: With dead ends: 127 [2021-05-06 03:37:31,120 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 03:37:31,121 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:37:31,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 03:37:31,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-06 03:37:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:37:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-05-06 03:37:31,138 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 64 [2021-05-06 03:37:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:31,139 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-05-06 03:37:31,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 03:37:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-05-06 03:37:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 03:37:31,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:31,141 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:31,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:31,367 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2021-05-06 03:37:31,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:31,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672627748] [2021-05-06 03:37:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:31,377 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:31,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258107628] [2021-05-06 03:37:31,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 03:37:31,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:31,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 03:37:31,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672627748] [2021-05-06 03:37:31,663 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258107628] [2021-05-06 03:37:31,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258107628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:37:31,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:37:31,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:37:31,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637338012] [2021-05-06 03:37:31,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:37:31,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:31,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:37:31,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:37:31,666 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:37:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:31,781 INFO L93 Difference]: Finished difference Result 131 states and 157 transitions. [2021-05-06 03:37:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:37:31,782 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 03:37:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:31,783 INFO L225 Difference]: With dead ends: 131 [2021-05-06 03:37:31,783 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 03:37:31,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:37:31,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 03:37:31,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 03:37:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 03:37:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 03:37:31,797 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 75 [2021-05-06 03:37:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:31,797 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 03:37:31,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:37:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 03:37:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 03:37:31,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:31,799 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:32,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:32,013 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1862740680, now seen corresponding path program 3 times [2021-05-06 03:37:32,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:32,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982689815] [2021-05-06 03:37:32,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:32,021 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:32,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38391012] [2021-05-06 03:37:32,021 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:32,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:37:32,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:37:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:37:32,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:32,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:32,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:32,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-05-06 03:37:32,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:32,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982689815] [2021-05-06 03:37:32,324 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:32,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38391012] [2021-05-06 03:37:32,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38391012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:37:32,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:37:32,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:37:32,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559315955] [2021-05-06 03:37:32,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:37:32,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:32,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:37:32,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:37:32,327 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:37:32,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:32,485 INFO L93 Difference]: Finished difference Result 123 states and 150 transitions. [2021-05-06 03:37:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:37:32,485 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 03:37:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:32,487 INFO L225 Difference]: With dead ends: 123 [2021-05-06 03:37:32,487 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 03:37:32,487 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:37:32,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 03:37:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 03:37:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 03:37:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-05-06 03:37:32,502 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 78 [2021-05-06 03:37:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:32,503 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-05-06 03:37:32,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 03:37:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-05-06 03:37:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 03:37:32,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:32,504 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:32,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:37:32,721 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 2 times [2021-05-06 03:37:32,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:32,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243048807] [2021-05-06 03:37:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:32,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:32,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911294016] [2021-05-06 03:37:32,733 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:32,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:37:32,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:37:32,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 03:37:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 03:37:33,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:33,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243048807] [2021-05-06 03:37:33,083 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:33,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911294016] [2021-05-06 03:37:33,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911294016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:37:33,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:37:33,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:37:33,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920581850] [2021-05-06 03:37:33,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:37:33,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:33,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:37:33,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:37:33,085 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 03:37:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:33,276 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-05-06 03:37:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:37:33,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-05-06 03:37:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:33,278 INFO L225 Difference]: With dead ends: 138 [2021-05-06 03:37:33,278 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 03:37:33,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:37:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 03:37:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 03:37:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:37:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-05-06 03:37:33,292 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 81 [2021-05-06 03:37:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:33,292 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-05-06 03:37:33,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 03:37:33,293 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-05-06 03:37:33,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 03:37:33,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:33,294 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:33,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:37:33,509 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:33,509 INFO L82 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 3 times [2021-05-06 03:37:33,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:33,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112416100] [2021-05-06 03:37:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:33,518 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:33,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040242199] [2021-05-06 03:37:33,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:33,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:37:33,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:37:33,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 03:37:33,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:33,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 03:37:33,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:33,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112416100] [2021-05-06 03:37:33,916 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:33,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040242199] [2021-05-06 03:37:33,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040242199] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:37:33,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:37:33,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:37:33,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076562000] [2021-05-06 03:37:33,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:37:33,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:33,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:37:33,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:37:33,918 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:37:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:34,139 INFO L93 Difference]: Finished difference Result 151 states and 174 transitions. [2021-05-06 03:37:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:37:34,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 03:37:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:34,141 INFO L225 Difference]: With dead ends: 151 [2021-05-06 03:37:34,141 INFO L226 Difference]: Without dead ends: 98 [2021-05-06 03:37:34,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:37:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-06 03:37:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-05-06 03:37:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 61 states have internal predecessors, (61), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:37:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-05-06 03:37:34,151 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 94 [2021-05-06 03:37:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:34,152 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-05-06 03:37:34,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:37:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-05-06 03:37:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 03:37:34,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:34,153 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:34,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:34,369 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:34,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:34,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1821891511, now seen corresponding path program 1 times [2021-05-06 03:37:34,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:34,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665215786] [2021-05-06 03:37:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:34,377 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:34,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594946539] [2021-05-06 03:37:34,377 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 [2021-05-06 03:37:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:34,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 03:37:34,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:34,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-05-06 03:37:34,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:34,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665215786] [2021-05-06 03:37:34,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:34,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594946539] [2021-05-06 03:37:34,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594946539] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:37:34,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:37:34,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:37:34,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762909530] [2021-05-06 03:37:34,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:37:34,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:34,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:37:34,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:37:34,800 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:37:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:34,885 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-05-06 03:37:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:37:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 03:37:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:34,886 INFO L225 Difference]: With dead ends: 116 [2021-05-06 03:37:34,887 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 03:37:34,887 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:37:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 03:37:34,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 03:37:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 54 states have (on average 1.0) internal successors, (54), 54 states have internal predecessors, (54), 19 states have call successors, (19), 14 states have call predecessors, (19), 12 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 03:37:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-05-06 03:37:34,896 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 94 [2021-05-06 03:37:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:34,897 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-05-06 03:37:34,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 03:37:34,897 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-05-06 03:37:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 03:37:34,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:37:34,898 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:37:35,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:35,113 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:37:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:37:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -282067362, now seen corresponding path program 1 times [2021-05-06 03:37:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:37:35,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610560240] [2021-05-06 03:37:35,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:37:35,120 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:37:35,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040617823] [2021-05-06 03:37:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:37:35,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:37:35,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 03:37:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:37:35,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:37:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 03:37:35,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:37:35,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610560240] [2021-05-06 03:37:35,632 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:37:35,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040617823] [2021-05-06 03:37:35,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040617823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:37:35,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:37:35,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 03:37:35,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103122233] [2021-05-06 03:37:35,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 03:37:35,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:37:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 03:37:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:37:35,634 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 03:37:35,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:37:35,819 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-05-06 03:37:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 03:37:35,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 03:37:35,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:37:35,820 INFO L225 Difference]: With dead ends: 86 [2021-05-06 03:37:35,820 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 03:37:35,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:37:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 03:37:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 03:37:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 03:37:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 03:37:35,824 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2021-05-06 03:37:35,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:37:35,824 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 03:37:35,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 03:37:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 03:37:35,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 03:37:36,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 03:37:36,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 03:37:36,434 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-05-06 03:37:36,795 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 54 [2021-05-06 03:37:37,003 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2021-05-06 03:37:37,378 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 52 [2021-05-06 03:37:37,543 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2021-05-06 03:37:37,684 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2021-05-06 03:37:37,869 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2021-05-06 03:37:37,872 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-06 03:37:37,872 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-06 03:37:37,872 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-06 03:37:37,872 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 03:37:37,873 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L194 CegarLoopUtils]: At program point L58(line 58) the Hoare annotation is: (and (= main_~B~0 main_~d~0) (= main_~p~0 1) (= main_~B~0 1)) [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 61) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point L52(lines 52 55) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point L52-2(lines 22 61) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point L46(lines 44 56) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 61) no Hoare annotation was computed. [2021-05-06 03:37:37,873 INFO L194 CegarLoopUtils]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~p~0 1)) (.cse1 (= main_~B~0 1))) (or (and (= main_~A~0 (+ main_~r~0 main_~d~0)) (= main_~d~0 1) (= main_~q~0 main_~p~0) .cse0 .cse1) (and (<= 0 main_~r~0) (= main_~d~0 (div (+ main_~A~0 (* main_~r~0 (- 1))) 2)) (<= main_~A~0 2) .cse0 .cse1 (< main_~r~0 main_~d~0) (= main_~q~0 2)) (and (= main_~B~0 main_~d~0) (= main_~q~0 0) (= main_~A~0 main_~r~0) .cse0 .cse1))) [2021-05-06 03:37:37,874 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse1 (<= 0 main_~A~0)) (.cse3 (<= main_~r~0 2)) (.cse4 (= main_~B~0 1)) (.cse0 (= main_~q~0 0)) (.cse2 (= main_~A~0 main_~r~0))) (or (and .cse0 .cse1 (= main_~d~0 (* (* (div (* main_~p~0 (- 1)) (- 2)) main_~B~0) 2)) (= main_~p~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4) (and .cse0 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (= main_~d~0 4) .cse2 (<= main_~A~0 2) (<= (div (* main_~d~0 (- 1)) (- 2)) main_~r~0)))) [2021-05-06 03:37:37,874 INFO L194 CegarLoopUtils]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse1 (<= 0 main_~A~0)) (.cse3 (<= main_~r~0 2)) (.cse4 (= main_~B~0 1)) (.cse0 (= main_~q~0 0)) (.cse2 (= main_~A~0 main_~r~0))) (or (and .cse0 .cse1 (= main_~d~0 (* (* (div (* main_~p~0 (- 1)) (- 2)) main_~B~0) 2)) (= main_~p~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4) (and .cse0 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (= main_~d~0 4) .cse2 (<= main_~A~0 2) (<= (div (* main_~d~0 (- 1)) (- 2)) main_~r~0)))) [2021-05-06 03:37:37,874 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 61) the Hoare annotation is: true [2021-05-06 03:37:37,874 INFO L198 CegarLoopUtils]: For program point L59(line 59) no Hoare annotation was computed. [2021-05-06 03:37:37,874 INFO L201 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-05-06 03:37:37,874 INFO L198 CegarLoopUtils]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-05-06 03:37:37,874 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (let ((.cse4 (= main_~q~0 2)) (.cse5 (= main_~B~0 main_~d~0)) (.cse2 (= main_~q~0 main_~p~0)) (.cse6 (= main_~p~0 1)) (.cse0 (= main_~d~0 (* main_~B~0 2))) (.cse3 (= main_~B~0 1)) (.cse7 (= main_~q~0 0)) (.cse8 (= main_~A~0 main_~r~0))) (or (let ((.cse1 (+ main_~r~0 main_~d~0))) (and (<= main_~d~0 main_~A~0) .cse0 (= main_~A~0 .cse1) .cse2 (<= .cse1 2) .cse3 .cse4)) (and .cse5 (<= 0 main_~r~0) (= main_~A~0 (+ main_~r~0 2)) (= main_~d~0 (div (+ main_~A~0 (* main_~r~0 (- 1))) 2)) .cse6 (< main_~r~0 main_~d~0) .cse4) (and .cse5 .cse7 .cse8 .cse6 .cse3) (and (= main_~A~0 (+ main_~r~0 main_~B~0)) (= main_~d~0 1) .cse2 .cse6 .cse3) (and .cse0 .cse7 (= main_~p~0 2) .cse8 .cse3) (and .cse7 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (= main_~d~0 4) .cse8 (<= main_~A~0 2) (<= (div (* main_~d~0 (- 1)) (- 2)) main_~r~0)))) [2021-05-06 03:37:37,874 INFO L194 CegarLoopUtils]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse4 (= main_~q~0 2)) (.cse2 (= main_~q~0 main_~p~0)) (.cse7 (= main_~p~0 1)) (.cse0 (= main_~d~0 (* main_~B~0 2))) (.cse3 (= main_~B~0 1)) (.cse5 (= main_~q~0 0)) (.cse6 (= main_~A~0 main_~r~0))) (or (let ((.cse1 (+ main_~r~0 main_~d~0))) (and (<= main_~d~0 main_~A~0) .cse0 (= main_~A~0 .cse1) .cse2 (<= .cse1 2) .cse3 .cse4)) (and (<= 0 main_~r~0) (= main_~A~0 (+ main_~r~0 2)) (= (div main_~q~0 2) main_~p~0) (= main_~d~0 (div (+ main_~A~0 (* main_~r~0 (- 1))) 2)) .cse3 (< main_~r~0 main_~d~0) .cse4) (and (= main_~B~0 main_~d~0) .cse5 .cse6 .cse7 .cse3) (and (= main_~A~0 (+ main_~r~0 main_~B~0)) (= main_~d~0 1) .cse2 .cse7 .cse3) (and .cse0 .cse5 (= main_~p~0 2) .cse6 .cse3) (and .cse5 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (= main_~d~0 4) .cse6 (<= main_~A~0 2) (<= (div (* main_~d~0 (- 1)) (- 2)) main_~r~0)))) [2021-05-06 03:37:37,874 INFO L198 CegarLoopUtils]: For program point L37(lines 34 42) no Hoare annotation was computed. [2021-05-06 03:37:37,874 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (<= 0 main_~A~0)) (.cse3 (<= main_~r~0 2)) (.cse4 (= main_~B~0 1)) (.cse0 (= main_~q~0 0)) (.cse2 (= main_~A~0 main_~r~0))) (or (and .cse0 .cse1 (= main_~d~0 (* (* (div (* main_~p~0 (- 1)) (- 2)) main_~B~0) 2)) (= main_~p~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4) (and .cse0 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (= main_~d~0 4) .cse2 (<= main_~A~0 2) (<= (div (* main_~d~0 (- 1)) (- 2)) main_~r~0)))) [2021-05-06 03:37:37,874 INFO L194 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse1 (<= 0 main_~A~0)) (.cse3 (<= main_~r~0 2)) (.cse4 (= main_~B~0 1)) (.cse0 (= main_~q~0 0)) (.cse2 (= main_~A~0 main_~r~0))) (or (and .cse0 .cse1 (= main_~d~0 (* (* (div (* main_~p~0 (- 1)) (- 2)) main_~B~0) 2)) (= main_~p~0 2) .cse2 .cse3 .cse4) (and .cse0 .cse1 .cse2 .cse3 (= main_~d~0 1) (= main_~p~0 1) .cse4) (and .cse0 (= main_~d~0 (* main_~B~0 4)) (= main_~p~0 4) (= main_~d~0 4) .cse2 (<= main_~A~0 2) (<= (div (* main_~d~0 (- 1)) (- 2)) main_~r~0)))) [2021-05-06 03:37:37,874 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-06 03:37:37,874 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-06 03:37:37,874 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-06 03:37:37,874 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-06 03:37:37,875 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-06 03:37:37,875 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-06 03:37:37,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 03:37:37 BoogieIcfgContainer [2021-05-06 03:37:37,892 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 03:37:37,892 INFO L168 Benchmark]: Toolchain (without parser) took 12373.82 ms. Allocated memory was 201.3 MB in the beginning and 333.4 MB in the end (delta: 132.1 MB). Free memory was 165.5 MB in the beginning and 194.1 MB in the end (delta: -28.5 MB). Peak memory consumption was 177.6 MB. Max. memory is 8.0 GB. [2021-05-06 03:37:37,892 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 201.3 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 03:37:37,892 INFO L168 Benchmark]: CACSL2BoogieTranslator took 410.15 ms. Allocated memory is still 201.3 MB. Free memory was 165.4 MB in the beginning and 155.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 03:37:37,893 INFO L168 Benchmark]: Boogie Preprocessor took 75.64 ms. Allocated memory is still 201.3 MB. Free memory was 155.6 MB in the beginning and 183.7 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-06 03:37:37,893 INFO L168 Benchmark]: RCFGBuilder took 434.28 ms. Allocated memory is still 201.3 MB. Free memory was 183.7 MB in the beginning and 168.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 03:37:37,893 INFO L168 Benchmark]: TraceAbstraction took 11429.23 ms. Allocated memory was 201.3 MB in the beginning and 333.4 MB in the end (delta: 132.1 MB). Free memory was 168.0 MB in the beginning and 194.1 MB in the end (delta: -26.1 MB). Peak memory consumption was 180.5 MB. Max. memory is 8.0 GB. [2021-05-06 03:37:37,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 201.3 MB. Free memory is still 182.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 410.15 ms. Allocated memory is still 201.3 MB. Free memory was 165.4 MB in the beginning and 155.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.64 ms. Allocated memory is still 201.3 MB. Free memory was 155.6 MB in the beginning and 183.7 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 434.28 ms. Allocated memory is still 201.3 MB. Free memory was 183.7 MB in the beginning and 168.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11429.23 ms. Allocated memory was 201.3 MB in the beginning and 333.4 MB in the end (delta: 132.1 MB). Free memory was 168.0 MB in the beginning and 194.1 MB in the end (delta: -26.1 MB). Peak memory consumption was 180.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9513.6ms, OverallIterations: 14, TraceHistogramMax: 16, EmptinessCheckTime: 28.1ms, AutomataDifference: 2465.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1830.6ms, InitialAbstractionConstructionTime: 19.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 573 SDtfs, 220 SDslu, 1981 SDs, 0 SdLazy, 1431 SolverSat, 197 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1291.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 798 GetRequests, 703 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1076.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=11, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 221.9ms AutomataMinimizationTime, 14 MinimizatonAttempts, 25 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 15 LocationsWithAnnotation, 94 PreInvPairs, 123 NumberOfFragments, 714 HoareAnnotationTreeSize, 94 FomulaSimplifications, 4980 FormulaSimplificationTreeSizeReduction, 232.3ms HoareSimplificationTime, 15 FomulaSimplificationsInter, 2171 FormulaSimplificationTreeSizeReductionInter, 1583.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 167.6ms SsaConstructionTime, 421.3ms SatisfiabilityAnalysisTime, 2994.7ms InterpolantComputationTime, 813 NumberOfCodeBlocks, 754 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 799 ConstructedInterpolants, 0 QuantifiedInterpolants, 3164 SizeOfPredicates, 23 NumberOfNonLiveVariables, 2155 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 2192/2297 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((((q == 0 && 0 <= A) && d == p * -1 / -2 * B * 2) && p == 2) && A == r) && r <= 2) && B == 1) || ((((((q == 0 && 0 <= A) && A == r) && r <= 2) && d == 1) && p == 1) && B == 1)) || ((((((q == 0 && d == B * 4) && p == 4) && d == 4) && A == r) && A <= 2) && d * -1 / -2 <= r) RESULT: Ultimate proved your program to be correct! Received shutdown request...