/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/hard-u_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:22:29,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:22:29,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:22:29,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:22:29,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:22:29,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:22:29,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:22:29,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:22:29,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:22:29,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:22:30,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:22:30,002 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:22:30,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:22:30,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:22:30,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:22:30,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:22:30,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:22:30,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:22:30,019 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:22:30,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:22:30,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 03:22:30,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:22:30,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:22:30,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:22:30,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:22:30,062 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:22:30,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:22:30,063 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:22:30,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:22:30,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:22:30,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:22:30,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:22:30,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:22:30,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:22:30,064 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:22:30,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:22:30,065 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:22:30,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:22:30,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:22:30,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:22:30,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:22:30,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:22:30,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:22:30,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:22:30,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:22:30,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:22:30,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:22:30,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:22:30,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:22:30,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:22:30,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:22:30,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:22:30,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:22:30,460 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:22:30,461 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:22:30,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound50.c [2021-05-06 03:22:30,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1cc15c61/a1e746f1d0004a3da2c98cee47fd57d4/FLAG64457758c [2021-05-06 03:22:30,947 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:22:30,948 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_unwindbound50.c [2021-05-06 03:22:30,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1cc15c61/a1e746f1d0004a3da2c98cee47fd57d4/FLAG64457758c [2021-05-06 03:22:31,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1cc15c61/a1e746f1d0004a3da2c98cee47fd57d4 [2021-05-06 03:22:31,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:22:31,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:22:31,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:22:31,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:22:31,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:22:31,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:22:31" (1/1) ... [2021-05-06 03:22:31,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63d126c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31, skipping insertion in model container [2021-05-06 03:22:31,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:22:31" (1/1) ... [2021-05-06 03:22:31,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:22:31,385 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:22:31,491 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/hard-u_unwindbound50.c[545,558] [2021-05-06 03:22:31,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:22:31,517 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:22:31,530 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/hard-u_unwindbound50.c[545,558] [2021-05-06 03:22:31,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:22:31,554 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:22:31,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31 WrapperNode [2021-05-06 03:22:31,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:22:31,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:22:31,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:22:31,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:22:31,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31" (1/1) ... [2021-05-06 03:22:31,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31" (1/1) ... [2021-05-06 03:22:31,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31" (1/1) ... [2021-05-06 03:22:31,624 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31" (1/1) ... [2021-05-06 03:22:31,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31" (1/1) ... [2021-05-06 03:22:31,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31" (1/1) ... [2021-05-06 03:22:31,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31" (1/1) ... [2021-05-06 03:22:31,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:22:31,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:22:31,649 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:22:31,649 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:22:31,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:22:31,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:22:31,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:22:31,724 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:22:31,724 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:22:31,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:22:31,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:22:31,725 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:22:31,725 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:22:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:22:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:22:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:22:31,726 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:22:31,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:22:31,727 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:22:31,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:22:31,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:22:31,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:22:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:22:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:22:31,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:22:32,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:22:32,061 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:22:32,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:22:32 BoogieIcfgContainer [2021-05-06 03:22:32,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:22:32,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:22:32,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:22:32,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:22:32,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:22:31" (1/3) ... [2021-05-06 03:22:32,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f5f759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:22:32, skipping insertion in model container [2021-05-06 03:22:32,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:22:31" (2/3) ... [2021-05-06 03:22:32,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f5f759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:22:32, skipping insertion in model container [2021-05-06 03:22:32,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:22:32" (3/3) ... [2021-05-06 03:22:32,070 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound50.c [2021-05-06 03:22:32,089 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:22:32,092 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:22:32,130 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:22:32,150 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:22:32,151 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:22:32,151 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:22:32,151 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:22:32,151 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:22:32,151 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:22:32,151 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:22:32,151 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:22:32,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:22:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:22:32,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:32,171 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:32,171 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-06 03:22:32,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:32,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118912985] [2021-05-06 03:22:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:32,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:22:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:32,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:22:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:22:32,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:32,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118912985] [2021-05-06 03:22:32,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118912985] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:22:32,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:22:32,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:22:32,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108607184] [2021-05-06 03:22:32,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:22:32,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:32,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:22:32,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:22:32,408 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:22:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:32,524 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-06 03:22:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:22:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:22:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:32,533 INFO L225 Difference]: With dead ends: 66 [2021-05-06 03:22:32,533 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:22:32,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:22:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:22:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-06 03:22:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:22:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 03:22:32,574 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-06 03:22:32,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:32,574 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 03:22:32,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:22:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 03:22:32,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 03:22:32,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:32,575 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:32,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:22:32,576 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:32,577 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-06 03:22:32,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:32,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444988196] [2021-05-06 03:22:32,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:32,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:22:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:32,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:22:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:22:32,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:32,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444988196] [2021-05-06 03:22:32,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444988196] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:22:32,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:22:32,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:22:32,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350862345] [2021-05-06 03:22:32,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:22:32,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:22:32,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:22:32,700 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:22:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:32,973 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-06 03:22:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:22:32,974 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 03:22:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:32,976 INFO L225 Difference]: With dead ends: 47 [2021-05-06 03:22:32,976 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 03:22:32,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 139.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:22:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 03:22:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-06 03:22:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:22:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 03:22:32,988 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-06 03:22:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:32,988 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 03:22:32,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 03:22:32,989 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 03:22:32,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 03:22:32,989 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:32,989 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:32,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:22:32,990 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:32,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:32,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-06 03:22:32,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:32,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166394483] [2021-05-06 03:22:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:33,003 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:22:33,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313517707] [2021-05-06 03:22:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 03:22:33,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:22:33,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:33,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:33,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:33,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:33,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:22:33,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:33,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166394483] [2021-05-06 03:22:33,169 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:22:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313517707] [2021-05-06 03:22:33,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313517707] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:22:33,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:22:33,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 03:22:33,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362142527] [2021-05-06 03:22:33,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 03:22:33,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:33,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 03:22:33,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:22:33,171 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:22:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:33,186 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-06 03:22:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 03:22:33,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 03:22:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:33,188 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:22:33,188 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 03:22:33,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 03:22:33,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 03:22:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 03:22:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:22:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-06 03:22:33,196 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-06 03:22:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:33,196 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-06 03:22:33,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 03:22:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-06 03:22:33,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 03:22:33,197 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:33,197 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:33,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 03:22:33,421 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-06 03:22:33,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:33,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544667051] [2021-05-06 03:22:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:33,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:22:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:33,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:22:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:33,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-06 03:22:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 03:22:33,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:33,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544667051] [2021-05-06 03:22:33,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544667051] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:22:33,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:22:33,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:22:33,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623022237] [2021-05-06 03:22:33,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:22:33,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:33,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:22:33,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:22:33,604 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:22:33,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:33,860 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-06 03:22:33,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:22:33,861 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 03:22:33,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:33,863 INFO L225 Difference]: With dead ends: 52 [2021-05-06 03:22:33,863 INFO L226 Difference]: Without dead ends: 50 [2021-05-06 03:22:33,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:22:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-06 03:22:33,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-06 03:22:33,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 03:22:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 03:22:33,879 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-06 03:22:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:33,880 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 03:22:33,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 03:22:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 03:22:33,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:22:33,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:33,881 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:33,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 03:22:33,881 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:33,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:33,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-06 03:22:33,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:33,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063200568] [2021-05-06 03:22:33,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:33,906 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:22:33,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027810681] [2021-05-06 03:22:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:22:33,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:22:34,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:34,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 03:22:34,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063200568] [2021-05-06 03:22:34,103 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:22:34,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027810681] [2021-05-06 03:22:34,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027810681] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:22:34,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:22:34,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:22:34,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159740342] [2021-05-06 03:22:34,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:22:34,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:22:34,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:22:34,109 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:22:36,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:36,369 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2021-05-06 03:22:36,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:22:36,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:22:36,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:36,371 INFO L225 Difference]: With dead ends: 59 [2021-05-06 03:22:36,371 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 03:22:36,372 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:22:36,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 03:22:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 03:22:36,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:22:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2021-05-06 03:22:36,379 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 28 [2021-05-06 03:22:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:36,379 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2021-05-06 03:22:36,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:22:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2021-05-06 03:22:36,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:22:36,380 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:36,380 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:36,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:36,601 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:36,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-06 03:22:36,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:36,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128463353] [2021-05-06 03:22:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:36,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:22:36,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586692716] [2021-05-06 03:22:36,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:36,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:22:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:22:36,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:36,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:36,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:36,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:36,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:36,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:36,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:36,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:22:36,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:36,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128463353] [2021-05-06 03:22:36,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:22:36,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586692716] [2021-05-06 03:22:36,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586692716] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:22:36,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:22:36,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:22:36,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642186797] [2021-05-06 03:22:36,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:22:36,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:36,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:22:36,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:22:36,801 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:22:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:36,858 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2021-05-06 03:22:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:22:36,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 03:22:36,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:36,861 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:22:36,861 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 03:22:36,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:22:36,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 03:22:36,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-06 03:22:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:22:36,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-06 03:22:36,885 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2021-05-06 03:22:36,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:36,886 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-06 03:22:36,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:22:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-06 03:22:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 03:22:36,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:36,889 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:37,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:37,105 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:37,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-06 03:22:37,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:37,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246783632] [2021-05-06 03:22:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:37,116 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:22:37,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253334988] [2021-05-06 03:22:37,117 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 [2021-05-06 03:22:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:37,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 03:22:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:22:37,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:22:37,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:37,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246783632] [2021-05-06 03:22:37,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:22:37,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253334988] [2021-05-06 03:22:37,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253334988] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:22:37,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:22:37,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:22:37,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189590906] [2021-05-06 03:22:37,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:22:37,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:37,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:22:37,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:22:37,327 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:22:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:37,595 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-06 03:22:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:22:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 03:22:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:37,600 INFO L225 Difference]: With dead ends: 82 [2021-05-06 03:22:37,600 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 03:22:37,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:22:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 03:22:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-06 03:22:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 03:22:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-06 03:22:37,609 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 36 [2021-05-06 03:22:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:37,609 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-06 03:22:37,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:22:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-06 03:22:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:22:37,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:37,610 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:37,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:37,811 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:37,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:37,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-06 03:22:37,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:37,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534478555] [2021-05-06 03:22:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:37,820 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:22:37,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063067229] [2021-05-06 03:22:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:37,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:22:37,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:22:37,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:22:37,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:37,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534478555] [2021-05-06 03:22:37,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:22:37,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063067229] [2021-05-06 03:22:37,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063067229] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:22:37,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:22:37,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 03:22:37,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120088768] [2021-05-06 03:22:37,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:22:37,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:22:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:22:37,991 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:22:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:38,062 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2021-05-06 03:22:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:22:38,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-06 03:22:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:38,065 INFO L225 Difference]: With dead ends: 94 [2021-05-06 03:22:38,065 INFO L226 Difference]: Without dead ends: 80 [2021-05-06 03:22:38,065 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:22:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-06 03:22:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-06 03:22:38,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 03:22:38,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2021-05-06 03:22:38,073 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 38 [2021-05-06 03:22:38,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:38,073 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2021-05-06 03:22:38,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 03:22:38,073 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2021-05-06 03:22:38,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 03:22:38,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:38,074 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:38,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:38,300 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:38,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:38,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-06 03:22:38,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:38,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436772041] [2021-05-06 03:22:38,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:38,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:22:38,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516597177] [2021-05-06 03:22:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:38,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 03:22:38,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:22:38,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:22:38,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:38,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436772041] [2021-05-06 03:22:38,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:22:38,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516597177] [2021-05-06 03:22:38,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516597177] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:22:38,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:22:38,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:22:38,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666435994] [2021-05-06 03:22:38,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:22:38,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:38,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:22:38,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:22:38,598 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:22:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:40,962 INFO L93 Difference]: Finished difference Result 103 states and 127 transitions. [2021-05-06 03:22:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 03:22:40,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 03:22:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:40,964 INFO L225 Difference]: With dead ends: 103 [2021-05-06 03:22:40,964 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 03:22:40,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:22:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 03:22:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2021-05-06 03:22:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:22:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2021-05-06 03:22:40,973 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 46 [2021-05-06 03:22:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:40,973 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2021-05-06 03:22:40,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:22:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2021-05-06 03:22:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 03:22:40,975 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:40,975 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:41,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:41,181 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:41,181 INFO L82 PathProgramCache]: Analyzing trace with hash -399036107, now seen corresponding path program 1 times [2021-05-06 03:22:41,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:41,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822823635] [2021-05-06 03:22:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:41,189 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:22:41,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [80203800] [2021-05-06 03:22:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:22:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:22:41,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 03:22:41,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:22:41,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:22:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:22:41,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:22:41,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822823635] [2021-05-06 03:22:41,425 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:22:41,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80203800] [2021-05-06 03:22:41,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80203800] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:22:41,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:22:41,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 03:22:41,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558722309] [2021-05-06 03:22:41,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:22:41,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:22:41,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:22:41,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:22:41,427 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 03:22:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:22:41,543 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-05-06 03:22:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:22:41,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-06 03:22:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:22:41,544 INFO L225 Difference]: With dead ends: 128 [2021-05-06 03:22:41,544 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 03:22:41,545 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:22:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 03:22:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-05-06 03:22:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.16) internal successors, (87), 77 states have internal predecessors, (87), 23 states have call successors, (23), 16 states have call predecessors, (23), 15 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 03:22:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-05-06 03:22:41,553 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 50 [2021-05-06 03:22:41,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:22:41,554 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-05-06 03:22:41,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 03:22:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-05-06 03:22:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 03:22:41,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:22:41,555 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:22:41,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:22:41,765 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:22:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:22:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash -397308229, now seen corresponding path program 1 times [2021-05-06 03:22:41,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:22:41,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674101469] [2021-05-06 03:22:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:22:41,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:22:41,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [179302669] [2021-05-06 03:22:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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