/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/geo3-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:23:47,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:23:47,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:23:47,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:23:47,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:23:47,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:23:47,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:23:47,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:23:47,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:23:47,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:23:47,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:23:47,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:23:47,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:23:47,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:23:47,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:23:47,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:23:47,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:23:47,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:23:47,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:23:47,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:23:47,146 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 [2021-05-02 15:23:47,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:23:47,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:23:47,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:23:47,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:23:47,176 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:23:47,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:23:47,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:23:47,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:23:47,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:23:47,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:23:47,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:23:47,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:23:47,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:23:47,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:23:47,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:23:47,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:23:47,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:23:47,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:23:47,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:23:47,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:23:47,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:23:47,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:23:47,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:23:47,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:23:47,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:23:47,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:23:47,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:23:47,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:23:47,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:23:47,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:23:47,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:23:47,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:23:47,476 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:23:47,476 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:23:47,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound50.c [2021-05-02 15:23:47,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871dd2e33/5c5f51395a354e1cbbe270c442f9aae8/FLAGf623918a0 [2021-05-02 15:23:48,003 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:23:48,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound50.c [2021-05-02 15:23:48,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871dd2e33/5c5f51395a354e1cbbe270c442f9aae8/FLAGf623918a0 [2021-05-02 15:23:48,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/871dd2e33/5c5f51395a354e1cbbe270c442f9aae8 [2021-05-02 15:23:48,264 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:23:48,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:23:48,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:48,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:23:48,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:23:48,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:48" (1/1) ... [2021-05-02 15:23:48,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135e9c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48, skipping insertion in model container [2021-05-02 15:23:48,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:23:48" (1/1) ... [2021-05-02 15:23:48,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:23:48,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:23:48,386 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/geo3-ll_unwindbound50.c[525,538] [2021-05-02 15:23:48,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:48,404 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:23:48,446 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/geo3-ll_unwindbound50.c[525,538] [2021-05-02 15:23:48,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:23:48,457 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:23:48,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48 WrapperNode [2021-05-02 15:23:48,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:23:48,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:23:48,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:23:48,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:23:48,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48" (1/1) ... [2021-05-02 15:23:48,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48" (1/1) ... [2021-05-02 15:23:48,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48" (1/1) ... [2021-05-02 15:23:48,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48" (1/1) ... [2021-05-02 15:23:48,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48" (1/1) ... [2021-05-02 15:23:48,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48" (1/1) ... [2021-05-02 15:23:48,474 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48" (1/1) ... [2021-05-02 15:23:48,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:23:48,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:23:48,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:23:48,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:23:48,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48" (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 [2021-05-02 15:23:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:23:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:23:48,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:23:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:23:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:23:48,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:23:48,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:23:48,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:23:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:23:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:23:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:23:48,528 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:23:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:23:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:23:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:23:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:23:48,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:23:48,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:23:48,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:23:48,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:23:48,751 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:23:48,751 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:23:48,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:48 BoogieIcfgContainer [2021-05-02 15:23:48,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:23:48,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:23:48,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:23:48,760 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:23:48,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:23:48" (1/3) ... [2021-05-02 15:23:48,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ecef46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:48, skipping insertion in model container [2021-05-02 15:23:48,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:23:48" (2/3) ... [2021-05-02 15:23:48,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ecef46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:23:48, skipping insertion in model container [2021-05-02 15:23:48,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:23:48" (3/3) ... [2021-05-02 15:23:48,766 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound50.c [2021-05-02 15:23:48,775 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:23:48,777 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:23:48,787 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:23:48,801 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:23:48,801 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:23:48,801 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:23:48,801 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:23:48,801 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:23:48,801 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:23:48,801 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:23:48,801 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:23:48,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 15:23:48,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:48,814 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:48,814 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-02 15:23:48,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:48,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514753810] [2021-05-02 15:23:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:48,877 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:48,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512188701] [2021-05-02 15:23:48,877 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 [2021-05-02 15:23:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:48,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 15:23:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:48,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:48,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514753810] [2021-05-02 15:23:48,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:48,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512188701] [2021-05-02 15:23:48,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512188701] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:48,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:48,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 15:23:48,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234799058] [2021-05-02 15:23:48,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 15:23:48,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:48,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 15:23:48,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:23:48,998 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:49,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:49,009 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-02 15:23:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 15:23:49,010 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 15:23:49,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:49,014 INFO L225 Difference]: With dead ends: 38 [2021-05-02 15:23:49,014 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 15:23:49,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 15:23:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 15:23:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 15:23:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 15:23:49,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 15:23:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:49,037 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 15:23:49,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 15:23:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:23:49,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:49,038 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:49,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 15:23:49,257 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-02 15:23:49,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:49,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917546187] [2021-05-02 15:23:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:49,270 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:49,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898854176] [2021-05-02 15:23:49,270 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 [2021-05-02 15:23:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:49,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:23:49,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:49,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:49,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:49,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:49,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:49,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:49,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:49,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917546187] [2021-05-02 15:23:49,465 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:49,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898854176] [2021-05-02 15:23:49,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898854176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:49,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:49,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:23:49,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380298062] [2021-05-02 15:23:49,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:23:49,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:49,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:23:49,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:23:49,467 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:49,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:49,478 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 15:23:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:23:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:23:49,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:49,479 INFO L225 Difference]: With dead ends: 26 [2021-05-02 15:23:49,479 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 15:23:49,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:23:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 15:23:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 15:23:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 15:23:49,483 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 15:23:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:49,483 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 15:23:49,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 15:23:49,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:23:49,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:49,483 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:49,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:49,689 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-02 15:23:49,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:49,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645723536] [2021-05-02 15:23:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:49,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:49,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473581212] [2021-05-02 15:23:49,698 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 [2021-05-02 15:23:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:49,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 15:23:49,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:49,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:49,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:49,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:49,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645723536] [2021-05-02 15:23:49,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:49,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473581212] [2021-05-02 15:23:49,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473581212] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:23:49,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:23:49,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:23:49,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706163504] [2021-05-02 15:23:49,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:23:49,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:49,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:23:49,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:23:49,837 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:49,870 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 15:23:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:23:49,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:23:49,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:49,871 INFO L225 Difference]: With dead ends: 28 [2021-05-02 15:23:49,872 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:23:49,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:23:49,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:23:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 15:23:49,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 15:23:49,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:49,876 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 15:23:49,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:23:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 15:23:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:23:49,876 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:49,876 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:50,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:50,094 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:50,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:50,094 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-02 15:23:50,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:50,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553156212] [2021-05-02 15:23:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:50,103 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:50,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272864198] [2021-05-02 15:23:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:50,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:23:50,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:50,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:50,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:50,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553156212] [2021-05-02 15:23:50,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:50,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272864198] [2021-05-02 15:23:50,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272864198] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:50,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:50,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:23:50,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882476847] [2021-05-02 15:23:50,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:23:50,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:50,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:23:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:23:50,280 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:50,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:50,323 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-02 15:23:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:23:50,324 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), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:23:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:50,325 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:23:50,326 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:23:50,328 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:23:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:23:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 15:23:50,332 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 15:23:50,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:50,332 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 15:23:50,332 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), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:50,332 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 15:23:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:23:50,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:50,332 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:50,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:50,535 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:50,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:50,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-02 15:23:50,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:50,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532835619] [2021-05-02 15:23:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:50,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:50,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783608162] [2021-05-02 15:23:50,543 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 [2021-05-02 15:23:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:23:50,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:50,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:50,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:50,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532835619] [2021-05-02 15:23:50,743 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:50,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783608162] [2021-05-02 15:23:50,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783608162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:50,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:50,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:23:50,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544793204] [2021-05-02 15:23:50,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:23:50,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:50,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:23:50,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:50,749 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:56,892 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 15:23:56,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:23:56,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:23:56,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:56,893 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:23:56,893 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:23:56,893 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:23:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:23:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-02 15:23:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:56,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-05-02 15:23:56,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2021-05-02 15:23:56,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:56,897 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-05-02 15:23:56,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:23:56,898 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-05-02 15:23:56,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 15:23:56,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:56,898 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:57,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:57,099 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:57,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash -475222577, now seen corresponding path program 1 times [2021-05-02 15:23:57,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:57,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940806642] [2021-05-02 15:23:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:57,108 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:57,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865779537] [2021-05-02 15:23:57,108 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 [2021-05-02 15:23:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:23:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:23:57,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:57,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:57,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:23:57,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:57,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940806642] [2021-05-02 15:23:57,227 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:57,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865779537] [2021-05-02 15:23:57,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865779537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:57,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:57,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:23:57,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126979218] [2021-05-02 15:23:57,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:23:57,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:57,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:23:57,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:23:57,228 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:23:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:59,292 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-05-02 15:23:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:23:59,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-05-02 15:23:59,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:59,294 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:23:59,294 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 15:23:59,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:23:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 15:23:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 15:23:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-05-02 15:23:59,298 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-05-02 15:23:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:59,298 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-05-02 15:23:59,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:23:59,298 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-05-02 15:23:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:23:59,298 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:59,299 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:59,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:59,513 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-02 15:23:59,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:59,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035767447] [2021-05-02 15:23:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:59,520 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:59,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660768733] [2021-05-02 15:23:59,520 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 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 [2021-05-02 15:23:59,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:23:59,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:23:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:23:59,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:23:59,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:23:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:23:59,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:23:59,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035767447] [2021-05-02 15:23:59,671 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:23:59,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660768733] [2021-05-02 15:23:59,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660768733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:23:59,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:23:59,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:23:59,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629164079] [2021-05-02 15:23:59,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:23:59,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:23:59,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:23:59,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:23:59,673 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:23:59,704 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-05-02 15:23:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:23:59,705 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:23:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:23:59,705 INFO L225 Difference]: With dead ends: 42 [2021-05-02 15:23:59,705 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:23:59,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:23:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:23:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:23:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:23:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 15:23:59,709 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2021-05-02 15:23:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:23:59,709 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 15:23:59,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:23:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 15:23:59,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:23:59,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:23:59,710 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:23:59,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:23:59,924 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:23:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:23:59,924 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-02 15:23:59,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:23:59,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47006443] [2021-05-02 15:23:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:23:59,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:23:59,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693788315] [2021-05-02 15:23:59,930 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 [2021-05-02 15:24:00,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:24:00,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:24:00,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:24:00,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:24:08,503 WARN L205 SmtUtils]: Spent 6.39 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 15:24:10,535 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 15 [2021-05-02 15:24:10,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:10,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:24:10,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:24:10,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47006443] [2021-05-02 15:24:10,571 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:24:10,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693788315] [2021-05-02 15:24:10,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693788315] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:24:10,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:24:10,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:24:10,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798719805] [2021-05-02 15:24:10,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:24:10,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:24:10,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:24:10,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-05-02 15:24:10,572 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:24:22,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:24:22,982 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-05-02 15:24:22,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:24:22,982 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:24:22,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:24:22,983 INFO L225 Difference]: With dead ends: 43 [2021-05-02 15:24:22,983 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 15:24:22,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10500.3ms TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2021-05-02 15:24:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 15:24:22,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-05-02 15:24:22,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:24:22,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 15:24:22,987 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 28 [2021-05-02 15:24:22,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:24:22,987 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 15:24:22,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:24:22,987 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 15:24:22,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:24:22,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:24:22,988 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:24:23,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:24:23,189 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:24:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:24:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-02 15:24:23,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:24:23,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994580444] [2021-05-02 15:24:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:24:23,196 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:24:23,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211595032] [2021-05-02 15:24:23,196 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 [2021-05-02 15:24:23,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:24:23,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:24:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:24:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:24:26,193 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-02 15:24:26,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:26,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:28,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:30,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:44,970 WARN L205 SmtUtils]: Spent 12.33 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 15:24:44,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:44,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:47,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:47,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:47,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:47,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:47,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:49,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:49,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:49,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:49,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:49,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:49,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:51,097 WARN L838 $PredicateComparison]: unable to prove that (or (= c___VERIFIER_assert_~cond 1) (and (= c___VERIFIER_assert_~cond 0) (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))))) is different from false [2021-05-02 15:24:51,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:51,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:53,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:53,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:53,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:53,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:53,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:55,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:55,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:55,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:55,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:55,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:55,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:24:57,327 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from false [2021-05-02 15:24:59,338 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)))))) is different from true [2021-05-02 15:24:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 1 not checked. [2021-05-02 15:24:59,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:24:59,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994580444] [2021-05-02 15:24:59,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:24:59,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211595032] [2021-05-02 15:24:59,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211595032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:24:59,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:24:59,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:24:59,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218255625] [2021-05-02 15:24:59,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:24:59,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:24:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:24:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=40, Unknown=5, NotChecked=26, Total=90 [2021-05-02 15:24:59,340 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:03,506 WARN L205 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 37 DAG size of output: 3 [2021-05-02 15:25:11,756 WARN L205 SmtUtils]: Spent 8.24 s on a formula simplification. DAG size of input: 43 DAG size of output: 6 [2021-05-02 15:25:48,505 WARN L205 SmtUtils]: Spent 19.57 s on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-02 15:27:14,667 WARN L205 SmtUtils]: Spent 1.16 m on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-05-02 15:27:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:27:16,671 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 15:27:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:27:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 15:27:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:27:16,683 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:27:16,683 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 15:27:16,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 136542.8ms TimeCoverageRelationStatistics Valid=44, Invalid=109, Unknown=11, NotChecked=46, Total=210 [2021-05-02 15:27:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 15:27:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 15:27:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:27:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 15:27:16,687 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 15:27:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:27:16,687 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 15:27:16,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:27:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 15:27:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:27:16,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:27:16,688 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:27:16,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:27:16,891 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:27:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:27:16,891 INFO L82 PathProgramCache]: Analyzing trace with hash 620230300, now seen corresponding path program 3 times [2021-05-02 15:27:16,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:27:16,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456828146] [2021-05-02 15:27:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:27:16,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:27:16,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630331497] [2021-05-02 15:27:16,898 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 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 [2021-05-02 15:27:17,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:27:17,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:27:17,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:27:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:27:21,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:21,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:23,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:27,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:27,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:27,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:27,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:27,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:27,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:27,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:29,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:29,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:29,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:29,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:29,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:29,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:29,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:31,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:31,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:31,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:31,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:31,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:31,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:31,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:33,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:33,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:33,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:33,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:33,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:33,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:33,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:35,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,585 WARN L205 SmtUtils]: Spent 10.21 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 15:27:50,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:50,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:52,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:54,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:54,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:54,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:54,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:54,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:54,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:27:54,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,050 WARN L205 SmtUtils]: Spent 10.41 s on a formula simplification that was a NOOP. DAG size: 37 [2021-05-02 15:28:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:11,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:13,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:13,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:13,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:13,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:13,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:13,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:13,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:15,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:15,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:15,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:15,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:15,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:15,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:15,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:15,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:17,227 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from false [2021-05-02 15:28:19,239 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0_BEFORE_CALL_15 Int) (v_main_~z~0_BEFORE_CALL_14 Int) (v_main_~x~0_BEFORE_CALL_9 Int)) (let ((.cse0 (+ (* v_main_~a~0_BEFORE_CALL_15 (- 1)) v_main_~x~0_BEFORE_CALL_9))) (let ((.cse2 (div .cse0 v_main_~z~0_BEFORE_CALL_14))) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_14 .cse2)) (.cse3 (* v_main_~a~0_BEFORE_CALL_15 v_main_~z~0_BEFORE_CALL_14))) (and (not (= v_main_~z~0_BEFORE_CALL_14 0)) (= (mod .cse0 v_main_~z~0_BEFORE_CALL_14) 0) (= (mod (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* .cse2 (- 1))) .cse3) 0) (not (= (+ (* v_main_~a~0_BEFORE_CALL_15 (div (+ v_main_~a~0_BEFORE_CALL_15 .cse1 (* (- 1) .cse2)) .cse3) v_main_~z~0_BEFORE_CALL_14 v_main_~z~0_BEFORE_CALL_14) v_main_~x~0_BEFORE_CALL_9) (+ v_main_~a~0_BEFORE_CALL_15 (* v_main_~z~0_BEFORE_CALL_14 v_main_~x~0_BEFORE_CALL_9)))) (not (= .cse3 0))))))) is different from true [2021-05-02 15:28:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:28:19,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:19,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456828146] [2021-05-02 15:28:19,240 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:19,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630331497] [2021-05-02 15:28:19,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630331497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:19,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:19,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:28:19,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110306727] [2021-05-02 15:28:19,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:28:19,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:19,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:28:19,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=49, Unknown=8, NotChecked=14, Total=90 [2021-05-02 15:28:19,241 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:28:29,002 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 45 DAG size of output: 6 [2021-05-02 15:30:01,595 WARN L205 SmtUtils]: Spent 1.19 m on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-02 15:30:31,220 WARN L205 SmtUtils]: Spent 25.43 s on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-02 15:30:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:30:35,273 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-05-02 15:30:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:30:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-05-02 15:30:35,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:30:35,286 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:30:35,286 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:30:35,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 156237.6ms TimeCoverageRelationStatistics Valid=41, Invalid=104, Unknown=15, NotChecked=22, Total=182 [2021-05-02 15:30:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:30:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:30:35,287 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) [2021-05-02 15:30:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:30:35,287 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 15:30:35,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:30:35,287 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:30:35,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:30:35,288 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:30:35,288 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:30:35,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:30:35,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:30:42,904 WARN L205 SmtUtils]: Spent 7.31 s on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-05-02 15:32:13,013 WARN L205 SmtUtils]: Spent 1.50 m on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2021-05-02 15:32:51,415 WARN L205 SmtUtils]: Spent 38.39 s on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-05-02 15:32:53,161 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-05-02 15:32:53,164 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:32:53,164 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:32:53,164 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:32:53,164 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 15:32:53,165 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse1 (= (* main_~z~0 main_~a~0) main_~az~0)) (.cse0 (= main_~a~0 main_~x~0))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~y~0 1) (<= ~counter~0 0) .cse1) (let ((.cse3 (= main_~z~0 0))) (let ((.cse8 (and .cse0 .cse3))) (and .cse1 (or (let ((.cse2 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (= (mod .cse2 main_~z~0) 0) (not .cse3) (let ((.cse4 (div .cse2 main_~z~0))) (let ((.cse6 (= main_~az~0 0)) (.cse5 (* main_~z~0 .cse4))) (or (and (= .cse4 (+ .cse5 main_~a~0)) .cse6) (let ((.cse7 (+ .cse5 (* .cse4 (- 1)) main_~a~0))) (and (not .cse6) (= (* (div .cse7 main_~az~0) main_~z~0) main_~y~0) (= (mod .cse7 main_~az~0) 0)))))))) .cse8) (or .cse8 (= (mod main_~y~0 main_~z~0) 0))))))) [2021-05-02 15:32:53,165 INFO L194 CegarLoopUtils]: At program point L34-4(lines 34 43) the Hoare annotation is: (or (let ((.cse1 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (let ((.cse0 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse0) main_~a~0) (+ (* main_~az~0 (div main_~y~0 main_~z~0)) .cse0))) (= (mod .cse1 main_~z~0) 0) (= (* main_~z~0 main_~a~0) main_~az~0) (not (= main_~z~0 0)) (= (mod main_~y~0 main_~z~0) 0))) (not (<= |old(~counter~0)| 0)) (= (+ main_~x~0 (* main_~y~0 main_~az~0)) (+ main_~a~0 (* main_~x~0 main_~z~0)))) [2021-05-02 15:32:53,165 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 22 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (<= ~counter~0 0)) [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 46) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 46) no Hoare annotation was computed. [2021-05-02 15:32:53,165 INFO L198 CegarLoopUtils]: For program point L44(line 44) no Hoare annotation was computed. [2021-05-02 15:32:53,166 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse1 (= (* main_~z~0 main_~a~0) main_~az~0)) (.cse0 (= main_~a~0 main_~x~0))) (or (not (<= |old(~counter~0)| 0)) (and (<= ~counter~0 1) .cse0 (= main_~y~0 1) .cse1) (let ((.cse3 (= main_~z~0 0))) (let ((.cse8 (and .cse0 .cse3))) (and .cse1 (or (let ((.cse2 (+ main_~x~0 (* main_~a~0 (- 1))))) (and (= (mod .cse2 main_~z~0) 0) (not .cse3) (let ((.cse4 (div .cse2 main_~z~0))) (let ((.cse6 (= main_~az~0 0)) (.cse5 (* main_~z~0 .cse4))) (or (and (= .cse4 (+ .cse5 main_~a~0)) .cse6) (let ((.cse7 (+ .cse5 (* .cse4 (- 1)) main_~a~0))) (and (not .cse6) (= (* (div .cse7 main_~az~0) main_~z~0) main_~y~0) (= (mod .cse7 main_~az~0) 0)))))))) .cse8) (or .cse8 (= (mod main_~y~0 main_~z~0) 0))))))) [2021-05-02 15:32:53,166 INFO L198 CegarLoopUtils]: For program point L35-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:32:53,166 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:32:53,166 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:32:53,166 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: (or (forall ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse1 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (or (not (let ((.cse0 (div .cse1 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse0) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse0)))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11)) (not (= (mod .cse1 v_main_~z~0_BEFORE_CALL_10) 0)) (not (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0)) (= v_main_~z~0_BEFORE_CALL_10 0)))) (exists ((v_main_~z~0_BEFORE_CALL_10 Int) (v_main_~y~0_BEFORE_CALL_8 Int) (v_main_~x~0_BEFORE_CALL_8 Int) (v_main_~a~0_BEFORE_CALL_11 Int)) (let ((.cse3 (+ v_main_~x~0_BEFORE_CALL_8 (* v_main_~a~0_BEFORE_CALL_11 (- 1))))) (and (let ((.cse2 (div .cse3 v_main_~z~0_BEFORE_CALL_10))) (= (+ (* v_main_~z~0_BEFORE_CALL_10 .cse2) v_main_~a~0_BEFORE_CALL_11) (+ (* (div v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) v_main_~z~0_BEFORE_CALL_10 v_main_~a~0_BEFORE_CALL_11) .cse2))) (= (mod v_main_~y~0_BEFORE_CALL_8 v_main_~z~0_BEFORE_CALL_10) 0) (= (mod .cse3 v_main_~z~0_BEFORE_CALL_10) 0) (not (= v_main_~z~0_BEFORE_CALL_10 0)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~y~0_BEFORE_CALL_8 v_main_~a~0_BEFORE_CALL_11) v_main_~x~0_BEFORE_CALL_8) (+ (* v_main_~z~0_BEFORE_CALL_10 v_main_~x~0_BEFORE_CALL_8) v_main_~a~0_BEFORE_CALL_11))))))) [2021-05-02 15:32:53,166 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:32:53,166 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:32:53,166 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:32:53,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:32:53 BoogieIcfgContainer [2021-05-02 15:32:53,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:32:53,177 INFO L168 Benchmark]: Toolchain (without parser) took 544911.82 ms. Allocated memory was 187.7 MB in the beginning and 225.4 MB in the end (delta: 37.7 MB). Free memory was 152.5 MB in the beginning and 112.8 MB in the end (delta: 39.7 MB). Peak memory consumption was 77.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:32:53,178 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 168.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:32:53,179 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.88 ms. Allocated memory is still 187.7 MB. Free memory was 152.3 MB in the beginning and 170.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:32:53,180 INFO L168 Benchmark]: Boogie Preprocessor took 17.18 ms. Allocated memory is still 187.7 MB. Free memory was 170.6 MB in the beginning and 169.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:32:53,180 INFO L168 Benchmark]: RCFGBuilder took 276.35 ms. Allocated memory is still 187.7 MB. Free memory was 169.0 MB in the beginning and 154.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:32:53,180 INFO L168 Benchmark]: TraceAbstraction took 544423.23 ms. Allocated memory was 187.7 MB in the beginning and 225.4 MB in the end (delta: 37.7 MB). Free memory was 154.3 MB in the beginning and 112.8 MB in the end (delta: 41.5 MB). Peak memory consumption was 78.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:32:53,181 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 168.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 190.88 ms. Allocated memory is still 187.7 MB. Free memory was 152.3 MB in the beginning and 170.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.18 ms. Allocated memory is still 187.7 MB. Free memory was 170.6 MB in the beginning and 169.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 276.35 ms. Allocated memory is still 187.7 MB. Free memory was 169.0 MB in the beginning and 154.8 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 544423.23 ms. Allocated memory was 187.7 MB in the beginning and 225.4 MB in the end (delta: 37.7 MB). Free memory was 154.3 MB in the beginning and 112.8 MB in the end (delta: 41.5 MB). Peak memory consumption was 78.7 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 406689.1ms, OverallIterations: 10, TraceHistogramMax: 4, EmptinessCheckTime: 8.9ms, AutomataDifference: 294168.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 137675.3ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 172 SDtfs, 76 SDslu, 588 SDs, 0 SdLazy, 301 SolverSat, 21 SolverUnsat, 29 SolverUnknown, 0 SolverNotchecked, 63521.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 303464.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=8, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 39.7ms AutomataMinimizationTime, 10 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 19 PreInvPairs, 30 NumberOfFragments, 478 HoareAnnotationTreeSize, 19 FomulaSimplifications, 285 FormulaSimplificationTreeSizeReduction, 79.4ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 1084 FormulaSimplificationTreeSizeReductionInter, 137584.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 97.0ms SsaConstructionTime, 430.0ms SatisfiabilityAnalysisTime, 109423.1ms InterpolantComputationTime, 229 NumberOfCodeBlocks, 197 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 219 ConstructedInterpolants, 6 QuantifiedInterpolants, 1766 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1345 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 97/130 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: (!(\old(counter) <= 0) || (((a == x && y == 1) && counter <= 0) && z * a == az)) || ((z * a == az && ((((x + a * -1) % z == 0 && !(z == 0)) && (((x + a * -1) / z == z * ((x + a * -1) / z) + a && az == 0) || ((!(az == 0) && (z * ((x + a * -1) / z) + (x + a * -1) / z * -1 + a) / az * z == y) && (z * ((x + a * -1) / z) + (x + a * -1) / z * -1 + a) % az == 0))) || (a == x && z == 0))) && ((a == x && z == 0) || y % z == 0)) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...