/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/egcd3-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:36:47,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:36:47,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:36:47,111 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:36:47,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:36:47,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:36:47,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:36:47,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:36:47,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:36:47,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:36:47,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:36:47,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:36:47,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:36:47,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:36:47,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:36:47,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:36:47,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:36:47,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:36:47,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:36:47,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:36:47,155 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 02:36:47,189 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:36:47,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:36:47,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:36:47,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:36:47,191 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:36:47,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:36:47,191 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:36:47,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:36:47,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:36:47,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:36:47,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:36:47,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:36:47,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:36:47,192 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:36:47,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:36:47,192 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:36:47,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:36:47,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:36:47,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:36:47,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:36:47,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:36:47,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:36:47,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:36:47,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:36:47,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:36:47,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:36:47,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:36:47,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:36:47,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:36:47,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:36:47,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:36:47,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:36:47,446 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:36:47,447 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:36:47,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-05-06 02:36:47,501 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1045c2073/7aeac9528ea24f9daf995ee880143601/FLAG99dac3c78 [2021-05-06 02:36:47,894 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:36:47,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound10.c [2021-05-06 02:36:47,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1045c2073/7aeac9528ea24f9daf995ee880143601/FLAG99dac3c78 [2021-05-06 02:36:47,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1045c2073/7aeac9528ea24f9daf995ee880143601 [2021-05-06 02:36:47,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:36:47,917 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:36:47,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:36:47,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:36:47,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:36:47,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:36:47" (1/1) ... [2021-05-06 02:36:47,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25061938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:47, skipping insertion in model container [2021-05-06 02:36:47,924 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:36:47" (1/1) ... [2021-05-06 02:36:47,928 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:36:47,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:36:48,058 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/egcd3-ll_valuebound10.c[490,503] [2021-05-06 02:36:48,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:36:48,083 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:36:48,098 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/egcd3-ll_valuebound10.c[490,503] [2021-05-06 02:36:48,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:36:48,136 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:36:48,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48 WrapperNode [2021-05-06 02:36:48,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:36:48,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:36:48,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:36:48,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:36:48,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48" (1/1) ... [2021-05-06 02:36:48,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48" (1/1) ... [2021-05-06 02:36:48,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48" (1/1) ... [2021-05-06 02:36:48,155 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48" (1/1) ... [2021-05-06 02:36:48,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48" (1/1) ... [2021-05-06 02:36:48,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48" (1/1) ... [2021-05-06 02:36:48,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48" (1/1) ... [2021-05-06 02:36:48,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:36:48,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:36:48,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:36:48,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:36:48,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:36:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:36:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:36:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:36:48,233 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:36:48,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:36:48,234 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:36:48,234 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:36:48,234 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:36:48,234 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:36:48,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:36:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:36:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:36:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:36:48,235 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:36:48,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:36:48,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:36:48,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:36:48,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:36:48,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:36:48,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:36:48,443 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:36:48,444 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 02:36:48,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:36:48 BoogieIcfgContainer [2021-05-06 02:36:48,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:36:48,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:36:48,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:36:48,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:36:48,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:36:47" (1/3) ... [2021-05-06 02:36:48,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba6063d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:36:48, skipping insertion in model container [2021-05-06 02:36:48,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:36:48" (2/3) ... [2021-05-06 02:36:48,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ba6063d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:36:48, skipping insertion in model container [2021-05-06 02:36:48,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:36:48" (3/3) ... [2021-05-06 02:36:48,466 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2021-05-06 02:36:48,469 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:36:48,471 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:36:48,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:36:48,520 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:36:48,520 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:36:48,520 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:36:48,521 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:36:48,521 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:36:48,521 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:36:48,521 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:36:48,521 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:36:48,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:36:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:36:48,536 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:48,536 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:48,537 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:48,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:48,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-06 02:36:48,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:48,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316527862] [2021-05-06 02:36:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:48,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:36:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:48,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:36:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:48,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:36:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:48,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:36:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:48,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:36:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:36:48,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:48,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316527862] [2021-05-06 02:36:48,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316527862] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:48,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:48,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:36:48,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016301112] [2021-05-06 02:36:48,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:36:48,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:48,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:36:48,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:36:48,716 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:48,811 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-06 02:36:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:36:48,829 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:36:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:48,834 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:36:48,834 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:36:48,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:36:48,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:36:48,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:36:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:36:48,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 02:36:48,881 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 02:36:48,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:48,882 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 02:36:48,882 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 02:36:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:36:48,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:48,883 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 02:36:48,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:36:48,883 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:48,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:48,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-06 02:36:48,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:48,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968968076] [2021-05-06 02:36:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:48,916 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:48,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830725255] [2021-05-06 02:36:48,916 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 02:36:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:48,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:36:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:49,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:36:49,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:49,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968968076] [2021-05-06 02:36:49,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:49,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830725255] [2021-05-06 02:36:49,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830725255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:49,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:49,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:36:49,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096300642] [2021-05-06 02:36:49,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:36:49,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:49,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:36:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:36:49,117 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:36:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:49,192 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 02:36:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:36:49,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 02:36:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:49,194 INFO L225 Difference]: With dead ends: 54 [2021-05-06 02:36:49,194 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:36:49,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:49,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:36:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 02:36:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:36:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 02:36:49,214 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 02:36:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:49,214 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 02:36:49,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:36:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 02:36:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:36:49,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:49,220 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 02:36:49,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:36:49,433 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-06 02:36:49,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:49,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050224716] [2021-05-06 02:36:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:49,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:49,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590709633] [2021-05-06 02:36:49,457 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 02:36:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:49,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:36:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:49,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:36:49,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:49,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050224716] [2021-05-06 02:36:49,680 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:49,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590709633] [2021-05-06 02:36:49,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590709633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:49,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:49,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:36:49,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838002885] [2021-05-06 02:36:49,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:36:49,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:49,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:36:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:36:49,682 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:49,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:49,768 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-05-06 02:36:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:36:49,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 02:36:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:49,770 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:36:49,770 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 02:36:49,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 02:36:49,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 02:36:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:36:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 02:36:49,778 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 02:36:49,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:49,778 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 02:36:49,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:49,778 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 02:36:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:36:49,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:49,779 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:36:49,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:49,993 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-06 02:36:49,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:49,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310227965] [2021-05-06 02:36:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:50,003 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:50,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938529545] [2021-05-06 02:36:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:36:50,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:50,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:36:50,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:50,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:36:50,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:50,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310227965] [2021-05-06 02:36:50,131 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:50,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938529545] [2021-05-06 02:36:50,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938529545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:50,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:50,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:36:50,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125412173] [2021-05-06 02:36:50,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:36:50,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:50,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:36:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:50,132 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:50,285 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2021-05-06 02:36:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:36:50,287 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 02:36:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:50,288 INFO L225 Difference]: With dead ends: 103 [2021-05-06 02:36:50,288 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 02:36:50,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 02:36:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 02:36:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:36:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 02:36:50,298 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 02:36:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:50,299 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 02:36:50,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:36:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 02:36:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:36:50,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:50,299 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 02:36:50,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:50,518 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:50,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-06 02:36:50,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:50,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874480182] [2021-05-06 02:36:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:50,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:50,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040836914] [2021-05-06 02:36:50,527 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 02:36:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:36:50,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:50,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:36:50,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874480182] [2021-05-06 02:36:50,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:50,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040836914] [2021-05-06 02:36:50,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040836914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:50,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:50,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:36:50,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662131981] [2021-05-06 02:36:50,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:36:50,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:36:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:50,807 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:36:51,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:51,016 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2021-05-06 02:36:51,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:51,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:36:51,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:51,020 INFO L225 Difference]: With dead ends: 86 [2021-05-06 02:36:51,020 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 02:36:51,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 02:36:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 02:36:51,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:36:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 02:36:51,030 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 02:36:51,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:51,031 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 02:36:51,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:36:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 02:36:51,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:36:51,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:51,031 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:36:51,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:51,241 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:51,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2021-05-06 02:36:51,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:51,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407167897] [2021-05-06 02:36:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:51,249 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:51,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889161652] [2021-05-06 02:36:51,249 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 02:36:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:51,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 02:36:51,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:51,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:36:51,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:51,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407167897] [2021-05-06 02:36:51,521 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:51,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889161652] [2021-05-06 02:36:51,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889161652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:51,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:51,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:36:51,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803440443] [2021-05-06 02:36:51,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:36:51,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:51,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:36:51,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:36:51,523 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:36:51,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:51,719 INFO L93 Difference]: Finished difference Result 105 states and 139 transitions. [2021-05-06 02:36:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:51,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-06 02:36:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:51,721 INFO L225 Difference]: With dead ends: 105 [2021-05-06 02:36:51,721 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 02:36:51,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:36:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 02:36:51,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 02:36:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:36:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 02:36:51,731 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 02:36:51,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:51,731 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 02:36:51,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:36:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 02:36:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:36:51,732 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:51,732 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:51,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:36:51,945 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:51,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:51,945 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-06 02:36:51,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:51,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165396590] [2021-05-06 02:36:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:51,967 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:51,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601964256] [2021-05-06 02:36:51,967 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 02:36:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:52,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:36:52,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:52,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:36:52,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:52,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165396590] [2021-05-06 02:36:52,108 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:52,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601964256] [2021-05-06 02:36:52,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601964256] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:52,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:52,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 02:36:52,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015329293] [2021-05-06 02:36:52,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:36:52,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:52,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:36:52,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:36:52,110 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:52,241 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2021-05-06 02:36:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:36:52,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 02:36:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:52,242 INFO L225 Difference]: With dead ends: 107 [2021-05-06 02:36:52,242 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 02:36:52,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 02:36:52,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 02:36:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:36:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 02:36:52,253 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 02:36:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:52,253 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 02:36:52,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:36:52,253 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 02:36:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:36:52,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:52,254 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:52,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:52,469 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:52,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:52,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2021-05-06 02:36:52,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:52,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83154255] [2021-05-06 02:36:52,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:52,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:52,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747980035] [2021-05-06 02:36:52,477 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 02:36:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:36:52,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:52,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:36:52,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:52,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83154255] [2021-05-06 02:36:52,639 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:52,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747980035] [2021-05-06 02:36:52,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747980035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:52,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:52,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:36:52,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977677791] [2021-05-06 02:36:52,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:36:52,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:36:52,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:36:52,640 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:36:52,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:52,732 INFO L93 Difference]: Finished difference Result 113 states and 145 transitions. [2021-05-06 02:36:52,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:36:52,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-05-06 02:36:52,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:52,733 INFO L225 Difference]: With dead ends: 113 [2021-05-06 02:36:52,733 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 02:36:52,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:36:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 02:36:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 02:36:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:36:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 02:36:52,743 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 02:36:52,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:52,743 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 02:36:52,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:36:52,743 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 02:36:52,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:36:52,749 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:52,749 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:52,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:52,950 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:52,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:52,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2021-05-06 02:36:52,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:52,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641768334] [2021-05-06 02:36:52,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:52,965 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:52,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661398227] [2021-05-06 02:36:52,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:53,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:53,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:53,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:36:53,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:53,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:36:53,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:53,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641768334] [2021-05-06 02:36:53,135 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:53,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661398227] [2021-05-06 02:36:53,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661398227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:53,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:53,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:36:53,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806246842] [2021-05-06 02:36:53,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:36:53,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:53,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:36:53,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:36:53,137 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:36:53,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:53,211 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2021-05-06 02:36:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:36:53,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-06 02:36:53,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:53,213 INFO L225 Difference]: With dead ends: 148 [2021-05-06 02:36:53,213 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 02:36:53,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:36:53,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 02:36:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 02:36:53,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:36:53,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 02:36:53,221 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 02:36:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:53,221 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 02:36:53,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:36:53,221 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 02:36:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:36:53,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:53,239 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 02:36:53,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:36:53,456 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-06 02:36:53,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:53,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881395799] [2021-05-06 02:36:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:53,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:53,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837867560] [2021-05-06 02:36:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:36:53,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:53,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:36:53,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:53,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881395799] [2021-05-06 02:36:53,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:53,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837867560] [2021-05-06 02:36:53,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837867560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:53,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:53,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:36:53,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293613706] [2021-05-06 02:36:53,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:36:53,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:53,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:36:53,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:36:53,566 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:36:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:53,616 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2021-05-06 02:36:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:36:53,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 02:36:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:53,617 INFO L225 Difference]: With dead ends: 130 [2021-05-06 02:36:53,617 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 02:36:53,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:36:53,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 02:36:53,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 02:36:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 02:36:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 02:36:53,630 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 02:36:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:53,631 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 02:36:53,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:36:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 02:36:53,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:36:53,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:53,631 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:53,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:53,845 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:53,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1926690588, now seen corresponding path program 1 times [2021-05-06 02:36:53,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:53,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990005600] [2021-05-06 02:36:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:53,853 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:53,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034951661] [2021-05-06 02:36:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:53,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:36:53,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:53,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:53,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:54,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:36:54,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:54,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990005600] [2021-05-06 02:36:54,015 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:54,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034951661] [2021-05-06 02:36:54,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034951661] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:54,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:54,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:36:54,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912902566] [2021-05-06 02:36:54,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:36:54,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:36:54,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:54,016 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:54,192 INFO L93 Difference]: Finished difference Result 166 states and 231 transitions. [2021-05-06 02:36:54,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 52 [2021-05-06 02:36:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:54,194 INFO L225 Difference]: With dead ends: 166 [2021-05-06 02:36:54,195 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 02:36:54,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:36:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 02:36:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 02:36:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 02:36:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 02:36:54,206 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 02:36:54,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:54,206 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 02:36:54,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:36:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 02:36:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 02:36:54,207 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:54,207 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:54,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:54,421 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-06 02:36:54,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:54,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598347383] [2021-05-06 02:36:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:54,428 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:54,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989474577] [2021-05-06 02:36:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:54,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 02:36:54,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:54,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:36:54,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:54,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598347383] [2021-05-06 02:36:54,700 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:54,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989474577] [2021-05-06 02:36:54,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989474577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:54,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:54,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:36:54,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235197486] [2021-05-06 02:36:54,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:36:54,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:54,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:36:54,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:36:54,701 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:36:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:54,991 INFO L93 Difference]: Finished difference Result 178 states and 243 transitions. [2021-05-06 02:36:54,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:36:54,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-06 02:36:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:55,004 INFO L225 Difference]: With dead ends: 178 [2021-05-06 02:36:55,005 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 02:36:55,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 158.0ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:36:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 02:36:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 02:36:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 02:36:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 02:36:55,040 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 02:36:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:55,040 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 02:36:55,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:36:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 02:36:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:36:55,041 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:55,041 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:55,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:36:55,258 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:55,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:55,258 INFO L82 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 2 times [2021-05-06 02:36:55,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:55,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426887336] [2021-05-06 02:36:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:55,268 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:55,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936243510] [2021-05-06 02:36:55,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:55,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:55,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:55,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 02:36:55,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:55,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:36:55,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:55,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426887336] [2021-05-06 02:36:55,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:55,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936243510] [2021-05-06 02:36:55,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936243510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:55,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:55,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:36:55,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399225066] [2021-05-06 02:36:55,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:36:55,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:55,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:36:55,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:55,436 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:36:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:55,705 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2021-05-06 02:36:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:36:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 02:36:55,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:55,709 INFO L225 Difference]: With dead ends: 288 [2021-05-06 02:36:55,709 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 02:36:55,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:36:55,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 02:36:55,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 02:36:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 02:36:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 02:36:55,737 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 02:36:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:55,737 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 02:36:55,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:36:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 02:36:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:36:55,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:55,738 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:55,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:36:55,953 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2021-05-06 02:36:55,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:55,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821913885] [2021-05-06 02:36:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:55,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:55,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555664570] [2021-05-06 02:36:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:36:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:56,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 02:36:56,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:56,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821913885] [2021-05-06 02:36:56,146 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:56,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555664570] [2021-05-06 02:36:56,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555664570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:56,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:56,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:36:56,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123436188] [2021-05-06 02:36:56,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:36:56,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:56,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:36:56,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:36:56,147 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:36:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:56,322 INFO L93 Difference]: Finished difference Result 235 states and 330 transitions. [2021-05-06 02:36:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:36:56,322 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-06 02:36:56,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:56,323 INFO L225 Difference]: With dead ends: 235 [2021-05-06 02:36:56,323 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 02:36:56,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:36:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 02:36:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2021-05-06 02:36:56,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 123 states have (on average 1.1951219512195121) internal successors, (147), 130 states have internal predecessors, (147), 83 states have call successors, (83), 15 states have call predecessors, (83), 14 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 02:36:56,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 311 transitions. [2021-05-06 02:36:56,348 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 311 transitions. Word has length 74 [2021-05-06 02:36:56,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:56,348 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 311 transitions. [2021-05-06 02:36:56,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:36:56,348 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 311 transitions. [2021-05-06 02:36:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 02:36:56,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:56,349 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:56,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:36:56,565 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:56,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2021-05-06 02:36:56,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:56,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913955650] [2021-05-06 02:36:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:56,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:56,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081445699] [2021-05-06 02:36:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:56,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:36:56,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:56,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:56,734 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-06 02:36:56,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:56,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913955650] [2021-05-06 02:36:56,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:56,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081445699] [2021-05-06 02:36:56,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081445699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:56,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:56,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:36:56,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047657095] [2021-05-06 02:36:56,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:36:56,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:56,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:36:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:36:56,735 INFO L87 Difference]: Start difference. First operand 221 states and 311 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:36:56,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:56,858 INFO L93 Difference]: Finished difference Result 235 states and 322 transitions. [2021-05-06 02:36:56,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:36:56,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-05-06 02:36:56,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:56,860 INFO L225 Difference]: With dead ends: 235 [2021-05-06 02:36:56,860 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 02:36:56,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:36:56,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 02:36:56,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2021-05-06 02:36:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 139 states have internal predecessors, (156), 83 states have call successors, (83), 18 states have call predecessors, (83), 17 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 02:36:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 320 transitions. [2021-05-06 02:36:56,891 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 320 transitions. Word has length 72 [2021-05-06 02:36:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:56,892 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 320 transitions. [2021-05-06 02:36:56,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:36:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 320 transitions. [2021-05-06 02:36:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:36:56,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:56,892 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:57,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:57,109 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:57,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 2 times [2021-05-06 02:36:57,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:57,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618927536] [2021-05-06 02:36:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:57,115 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:57,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217921162] [2021-05-06 02:36:57,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:57,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:36:57,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 02:36:57,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:57,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,262 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 02:36:57,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618927536] [2021-05-06 02:36:57,262 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:57,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217921162] [2021-05-06 02:36:57,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217921162] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:57,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:57,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:36:57,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245927634] [2021-05-06 02:36:57,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:36:57,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:57,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:36:57,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:36:57,263 INFO L87 Difference]: Start difference. First operand 233 states and 320 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:36:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:57,331 INFO L93 Difference]: Finished difference Result 375 states and 510 transitions. [2021-05-06 02:36:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:36:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-06 02:36:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:57,333 INFO L225 Difference]: With dead ends: 375 [2021-05-06 02:36:57,333 INFO L226 Difference]: Without dead ends: 232 [2021-05-06 02:36:57,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:36:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-06 02:36:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 216. [2021-05-06 02:36:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 130 states have internal predecessors, (148), 71 states have call successors, (71), 18 states have call predecessors, (71), 17 states have return successors, (69), 67 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 02:36:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 288 transitions. [2021-05-06 02:36:57,356 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 288 transitions. Word has length 77 [2021-05-06 02:36:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:57,356 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 288 transitions. [2021-05-06 02:36:57,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:36:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 288 transitions. [2021-05-06 02:36:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:36:57,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:57,357 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:57,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:36:57,573 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2139677040, now seen corresponding path program 3 times [2021-05-06 02:36:57,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:57,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517608420] [2021-05-06 02:36:57,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:57,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:57,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1303384095] [2021-05-06 02:36:57,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:57,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:36:57,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:57,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 02:36:57,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:57,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:36:57,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:57,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517608420] [2021-05-06 02:36:57,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:57,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303384095] [2021-05-06 02:36:57,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303384095] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:36:57,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:36:57,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:36:57,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473987927] [2021-05-06 02:36:57,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:36:57,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:57,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:36:57,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:36:57,708 INFO L87 Difference]: Start difference. First operand 216 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:36:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:57,758 INFO L93 Difference]: Finished difference Result 238 states and 319 transitions. [2021-05-06 02:36:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:36:57,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-06 02:36:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:57,760 INFO L225 Difference]: With dead ends: 238 [2021-05-06 02:36:57,760 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 02:36:57,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:36:57,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 02:36:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 232. [2021-05-06 02:36:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 134 states have (on average 1.171641791044776) internal successors, (157), 137 states have internal predecessors, (157), 79 states have call successors, (79), 19 states have call predecessors, (79), 18 states have return successors, (77), 75 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-06 02:36:57,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 313 transitions. [2021-05-06 02:36:57,785 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 313 transitions. Word has length 77 [2021-05-06 02:36:57,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:57,785 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 313 transitions. [2021-05-06 02:36:57,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:36:57,785 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 313 transitions. [2021-05-06 02:36:57,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:36:57,786 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:57,786 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:58,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:36:58,001 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:58,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:58,001 INFO L82 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 4 times [2021-05-06 02:36:58,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:58,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306137892] [2021-05-06 02:36:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:58,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:58,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797372411] [2021-05-06 02:36:58,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:58,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:36:58,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:36:58,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-06 02:36:58,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:58,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:36:58,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:58,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306137892] [2021-05-06 02:36:58,472 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:58,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797372411] [2021-05-06 02:36:58,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797372411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:58,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:58,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:36:58,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393031733] [2021-05-06 02:36:58,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:36:58,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:36:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:36:58,474 INFO L87 Difference]: Start difference. First operand 232 states and 313 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 02:36:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:58,990 INFO L93 Difference]: Finished difference Result 299 states and 398 transitions. [2021-05-06 02:36:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:36:58,991 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 77 [2021-05-06 02:36:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:58,992 INFO L225 Difference]: With dead ends: 299 [2021-05-06 02:36:58,992 INFO L226 Difference]: Without dead ends: 297 [2021-05-06 02:36:58,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:36:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-06 02:36:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 236. [2021-05-06 02:36:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.167883211678832) internal successors, (160), 140 states have internal predecessors, (160), 79 states have call successors, (79), 20 states have call predecessors, (79), 19 states have return successors, (77), 75 states have call predecessors, (77), 77 states have call successors, (77) [2021-05-06 02:36:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 316 transitions. [2021-05-06 02:36:59,021 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 316 transitions. Word has length 77 [2021-05-06 02:36:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:59,021 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 316 transitions. [2021-05-06 02:36:59,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 02:36:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 316 transitions. [2021-05-06 02:36:59,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:36:59,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:59,022 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:36:59,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:36:59,237 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:36:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:36:59,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1033380920, now seen corresponding path program 1 times [2021-05-06 02:36:59,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:36:59,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658427119] [2021-05-06 02:36:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:36:59,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:36:59,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909511646] [2021-05-06 02:36:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:36:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:36:59,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 02:36:59,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:36:59,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:36:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 02:36:59,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:36:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658427119] [2021-05-06 02:36:59,471 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:36:59,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909511646] [2021-05-06 02:36:59,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909511646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:36:59,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:36:59,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:36:59,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503284767] [2021-05-06 02:36:59,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:36:59,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:36:59,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:36:59,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:36:59,473 INFO L87 Difference]: Start difference. First operand 236 states and 316 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:36:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:36:59,768 INFO L93 Difference]: Finished difference Result 345 states and 477 transitions. [2021-05-06 02:36:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:36:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2021-05-06 02:36:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:36:59,770 INFO L225 Difference]: With dead ends: 345 [2021-05-06 02:36:59,770 INFO L226 Difference]: Without dead ends: 343 [2021-05-06 02:36:59,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:36:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-06 02:36:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 254. [2021-05-06 02:36:59,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 145 states have (on average 1.1586206896551725) internal successors, (168), 150 states have internal predecessors, (168), 87 states have call successors, (87), 22 states have call predecessors, (87), 21 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 02:36:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 340 transitions. [2021-05-06 02:36:59,799 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 340 transitions. Word has length 79 [2021-05-06 02:36:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:36:59,799 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 340 transitions. [2021-05-06 02:36:59,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:36:59,799 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 340 transitions. [2021-05-06 02:36:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 02:36:59,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:36:59,800 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:00,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:00,018 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:00,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2021-05-06 02:37:00,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:00,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851165357] [2021-05-06 02:37:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:00,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:00,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996133693] [2021-05-06 02:37:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:37:00,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 02:37:00,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:00,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-06 02:37:00,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851165357] [2021-05-06 02:37:00,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996133693] [2021-05-06 02:37:00,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996133693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:00,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:00,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:37:00,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520962327] [2021-05-06 02:37:00,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:37:00,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:00,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:37:00,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:00,401 INFO L87 Difference]: Start difference. First operand 254 states and 340 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:37:01,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:01,024 INFO L93 Difference]: Finished difference Result 341 states and 462 transitions. [2021-05-06 02:37:01,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:37:01,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 02:37:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:01,026 INFO L225 Difference]: With dead ends: 341 [2021-05-06 02:37:01,026 INFO L226 Difference]: Without dead ends: 338 [2021-05-06 02:37:01,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:37:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-06 02:37:01,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 319. [2021-05-06 02:37:01,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 179 states have (on average 1.1787709497206704) internal successors, (211), 184 states have internal predecessors, (211), 115 states have call successors, (115), 25 states have call predecessors, (115), 24 states have return successors, (113), 109 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-06 02:37:01,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 439 transitions. [2021-05-06 02:37:01,088 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 439 transitions. Word has length 86 [2021-05-06 02:37:01,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:01,088 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 439 transitions. [2021-05-06 02:37:01,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:37:01,088 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 439 transitions. [2021-05-06 02:37:01,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 02:37:01,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:01,089 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:01,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:01,305 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 2 times [2021-05-06 02:37:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968896370] [2021-05-06 02:37:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:01,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:01,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888218736] [2021-05-06 02:37:01,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:01,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:01,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 02:37:01,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:01,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:01,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:01,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:01,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:01,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:01,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:01,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:01,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:37:01,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968896370] [2021-05-06 02:37:01,712 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888218736] [2021-05-06 02:37:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888218736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:01,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:01,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:37:01,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991678165] [2021-05-06 02:37:01,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:37:01,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:01,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:37:01,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:37:01,715 INFO L87 Difference]: Start difference. First operand 319 states and 439 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:37:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:02,408 INFO L93 Difference]: Finished difference Result 415 states and 569 transitions. [2021-05-06 02:37:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:37:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 02:37:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:02,410 INFO L225 Difference]: With dead ends: 415 [2021-05-06 02:37:02,411 INFO L226 Difference]: Without dead ends: 412 [2021-05-06 02:37:02,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:37:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-05-06 02:37:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388. [2021-05-06 02:37:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 216 states have (on average 1.1898148148148149) internal successors, (257), 221 states have internal predecessors, (257), 143 states have call successors, (143), 29 states have call predecessors, (143), 28 states have return successors, (141), 137 states have call predecessors, (141), 141 states have call successors, (141) [2021-05-06 02:37:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 541 transitions. [2021-05-06 02:37:02,457 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 541 transitions. Word has length 91 [2021-05-06 02:37:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:02,457 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 541 transitions. [2021-05-06 02:37:02,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:37:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 541 transitions. [2021-05-06 02:37:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 02:37:02,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:02,458 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:02,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 02:37:02,673 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1426729189, now seen corresponding path program 2 times [2021-05-06 02:37:02,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:02,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269219630] [2021-05-06 02:37:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:02,687 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:02,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102454067] [2021-05-06 02:37:02,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:02,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:02,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:02,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 02:37:02,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:02,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:02,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,129 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2021-05-06 02:37:03,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:03,378 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2021-05-06 02:37:03,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269219630] [2021-05-06 02:37:03,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:03,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102454067] [2021-05-06 02:37:03,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102454067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:03,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:03,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:37:03,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369418837] [2021-05-06 02:37:03,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:37:03,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:03,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:37:03,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:37:03,380 INFO L87 Difference]: Start difference. First operand 388 states and 541 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:37:04,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:04,271 INFO L93 Difference]: Finished difference Result 431 states and 602 transitions. [2021-05-06 02:37:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:37:04,271 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 96 [2021-05-06 02:37:04,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:04,273 INFO L225 Difference]: With dead ends: 431 [2021-05-06 02:37:04,273 INFO L226 Difference]: Without dead ends: 429 [2021-05-06 02:37:04,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 627.1ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:37:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-06 02:37:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 409. [2021-05-06 02:37:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 224 states have (on average 1.1919642857142858) internal successors, (267), 230 states have internal predecessors, (267), 155 states have call successors, (155), 30 states have call predecessors, (155), 29 states have return successors, (153), 148 states have call predecessors, (153), 153 states have call successors, (153) [2021-05-06 02:37:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 575 transitions. [2021-05-06 02:37:04,331 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 575 transitions. Word has length 96 [2021-05-06 02:37:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:04,331 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 575 transitions. [2021-05-06 02:37:04,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:37:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 575 transitions. [2021-05-06 02:37:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 02:37:04,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:04,333 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:04,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:37:04,549 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:04,549 INFO L82 PathProgramCache]: Analyzing trace with hash 844095065, now seen corresponding path program 2 times [2021-05-06 02:37:04,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:04,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671468568] [2021-05-06 02:37:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:04,555 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:04,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2093479108] [2021-05-06 02:37:04,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:04,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:37:04,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:04,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 02:37:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:04,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 30 proven. 38 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-05-06 02:37:04,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:04,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671468568] [2021-05-06 02:37:04,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:04,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093479108] [2021-05-06 02:37:04,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093479108] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:04,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:04,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:37:04,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153595172] [2021-05-06 02:37:04,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:37:04,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:04,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:37:04,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:37:04,726 INFO L87 Difference]: Start difference. First operand 409 states and 575 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 02:37:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:04,986 INFO L93 Difference]: Finished difference Result 573 states and 850 transitions. [2021-05-06 02:37:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:37:04,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 101 [2021-05-06 02:37:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:04,989 INFO L225 Difference]: With dead ends: 573 [2021-05-06 02:37:04,989 INFO L226 Difference]: Without dead ends: 571 [2021-05-06 02:37:04,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:37:04,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-05-06 02:37:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 518. [2021-05-06 02:37:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 256 states have (on average 1.20703125) internal successors, (309), 271 states have internal predecessors, (309), 231 states have call successors, (231), 31 states have call predecessors, (231), 30 states have return successors, (229), 215 states have call predecessors, (229), 229 states have call successors, (229) [2021-05-06 02:37:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 769 transitions. [2021-05-06 02:37:05,068 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 769 transitions. Word has length 101 [2021-05-06 02:37:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:05,068 INFO L480 AbstractCegarLoop]: Abstraction has 518 states and 769 transitions. [2021-05-06 02:37:05,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-05-06 02:37:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 769 transitions. [2021-05-06 02:37:05,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 02:37:05,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:37:05,069 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:37:05,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:05,277 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:37:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:37:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 5 times [2021-05-06 02:37:05,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:37:05,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50239449] [2021-05-06 02:37:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:37:05,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:37:05,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797773351] [2021-05-06 02:37:05,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:37:05,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:37:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:37:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 02:37:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:37:05,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:05,790 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-06 02:37:05,999 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-05-06 02:37:06,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:37:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 02:37:06,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:37:06,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50239449] [2021-05-06 02:37:06,439 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:37:06,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797773351] [2021-05-06 02:37:06,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797773351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:37:06,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:37:06,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:37:06,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51896038] [2021-05-06 02:37:06,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 02:37:06,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:37:06,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 02:37:06,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:37:06,440 INFO L87 Difference]: Start difference. First operand 518 states and 769 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:37:07,092 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-05-06 02:37:07,351 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-06 02:37:07,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:37:07,922 INFO L93 Difference]: Finished difference Result 656 states and 985 transitions. [2021-05-06 02:37:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:37:07,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 102 [2021-05-06 02:37:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:37:07,923 INFO L225 Difference]: With dead ends: 656 [2021-05-06 02:37:07,923 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:37:07,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1346.7ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-05-06 02:37:07,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:37:07,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:37:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:37:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:37:07,925 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2021-05-06 02:37:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:37:07,925 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:37:07,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:37:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:37:07,926 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:37:08,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:37:08,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:37:08,904 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 328 [2021-05-06 02:37:09,462 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 328 [2021-05-06 02:37:09,888 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 358 DAG size of output: 328 [2021-05-06 02:37:10,164 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 331 [2021-05-06 02:37:10,752 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 325 [2021-05-06 02:37:11,165 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 325 [2021-05-06 02:37:11,694 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 34 [2021-05-06 02:37:15,516 WARN L205 SmtUtils]: Spent 3.76 s on a formula simplification. DAG size of input: 315 DAG size of output: 50 [2021-05-06 02:37:18,904 WARN L205 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 315 DAG size of output: 50 [2021-05-06 02:37:21,887 WARN L205 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 315 DAG size of output: 50 [2021-05-06 02:37:26,929 WARN L205 SmtUtils]: Spent 5.04 s on a formula simplification. DAG size of input: 317 DAG size of output: 47 [2021-05-06 02:37:31,487 WARN L205 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 317 DAG size of output: 38 [2021-05-06 02:37:35,209 WARN L205 SmtUtils]: Spent 3.72 s on a formula simplification. DAG size of input: 317 DAG size of output: 38 [2021-05-06 02:37:35,457 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 20 [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:37:35,461 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:37:35,461 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:37:35,461 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:37:35,461 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:37:35,461 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:37:35,480 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 73) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10))) (or (and (= main_~r~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse2 (<= main_~a~0 main_~x~0) (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1) (<= main_~x~0 main_~a~0)) (and .cse0 .cse1 .cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (< main_~b~0 main_~a~0) (<= 1 main_~y~0)))) [2021-05-06 02:37:35,481 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 73) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (< main_~b~0 main_~a~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 0 main_~b~0) (<= 1 main_~y~0)) [2021-05-06 02:37:35,481 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 76) no Hoare annotation was computed. [2021-05-06 02:37:35,481 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 10)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) (= main_~s~0 1)) (and (<= main_~y~0 10) (<= 1 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse0 (< main_~b~0 main_~a~0) .cse1 .cse2))) [2021-05-06 02:37:35,481 INFO L198 CegarLoopUtils]: For program point L36(lines 36 37) no Hoare annotation was computed. [2021-05-06 02:37:35,481 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 10)) [2021-05-06 02:37:35,481 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~y~0 10) (<= 0 main_~x~0) (<= main_~x~0 10) (<= 0 main_~y~0)) [2021-05-06 02:37:35,481 INFO L198 CegarLoopUtils]: For program point L53(lines 49 59) no Hoare annotation was computed. [2021-05-06 02:37:35,482 INFO L194 CegarLoopUtils]: At program point L49-2(lines 49 59) the Hoare annotation is: (let ((.cse3 (<= main_~y~0 10)) (.cse4 (<= 1 main_~x~0)) (.cse0 (<= main_~x~0 10)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse5 (< main_~b~0 main_~a~0)) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) (= main_~s~0 1)) (and .cse3 .cse4 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse0 .cse5 .cse1 .cse2) (and .cse3 .cse4 (= main_~k~0 0) .cse0 .cse1 .cse5 (= main_~b~0 main_~v~0) (not (= main_~b~0 0)) (= main_~c~0 main_~a~0) .cse2 (= main_~d~0 1)))) [2021-05-06 02:37:35,482 INFO L198 CegarLoopUtils]: For program point L49-3(lines 49 59) no Hoare annotation was computed. [2021-05-06 02:37:35,482 INFO L198 CegarLoopUtils]: For program point L74(line 74) no Hoare annotation was computed. [2021-05-06 02:37:35,482 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (<= 0 main_~y~0)) [2021-05-06 02:37:35,482 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse3 (<= main_~y~0 10)) (.cse4 (<= 1 main_~x~0)) (.cse0 (<= main_~x~0 10)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse5 (< main_~b~0 main_~a~0)) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) (= main_~s~0 1)) (and .cse3 .cse4 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse0 .cse5 .cse1 .cse2) (and .cse3 .cse4 (= main_~k~0 0) .cse0 .cse1 .cse5 (= main_~b~0 main_~v~0) (not (= main_~b~0 0)) (= main_~c~0 main_~a~0) .cse2 (= main_~d~0 1)))) [2021-05-06 02:37:35,482 INFO L194 CegarLoopUtils]: At program point L50-1(line 50) the Hoare annotation is: (let ((.cse3 (<= main_~y~0 10)) (.cse4 (<= 1 main_~x~0)) (.cse0 (<= main_~x~0 10)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse5 (< main_~b~0 main_~a~0)) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) (= main_~s~0 1)) (and .cse3 .cse4 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse0 .cse5 .cse1 .cse2) (and .cse3 .cse4 (= main_~k~0 0) .cse0 .cse1 .cse5 (= main_~b~0 main_~v~0) (not (= main_~b~0 0)) (= main_~c~0 main_~a~0) .cse2 (= main_~d~0 1)))) [2021-05-06 02:37:35,482 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 76) no Hoare annotation was computed. [2021-05-06 02:37:35,482 INFO L194 CegarLoopUtils]: At program point L42-2(lines 42 62) the Hoare annotation is: (let ((.cse4 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse5 (<= 1 main_~y~0)) (.cse0 (<= main_~y~0 10)) (.cse1 (<= 1 main_~x~0)) (.cse6 (= main_~k~0 0)) (.cse2 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse7 (= main_~c~0 main_~a~0)) (.cse10 (= main_~r~0 0)) (.cse11 (= main_~b~0 main_~y~0)) (.cse3 (<= main_~x~0 10)) (.cse8 (<= main_~a~0 main_~x~0)) (.cse9 (<= 1 main_~b~0)) (.cse12 (= main_~p~0 1)) (.cse14 (<= main_~x~0 main_~a~0)) (.cse13 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (< main_~b~0 main_~a~0) .cse5) (and .cse0 .cse1 .cse6 .cse3 (< main_~b~0 main_~c~0) .cse4 .cse5 (not (= main_~b~0 0)) .cse7) (and .cse0 .cse1 .cse6 .cse8 .cse9 .cse10 .cse11 .cse2 .cse3 .cse7 .cse12 .cse13 .cse14) (and .cse10 (= main_~q~0 0) .cse11 .cse3 .cse8 .cse9 .cse12 (<= main_~b~0 main_~x~0) .cse14 .cse13))) [2021-05-06 02:37:35,482 INFO L198 CegarLoopUtils]: For program point L42-3(lines 42 62) no Hoare annotation was computed. [2021-05-06 02:37:35,483 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 76) the Hoare annotation is: true [2021-05-06 02:37:35,483 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:37:35,483 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:37:35,483 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:37:35,483 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 10)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~r~0 0) (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) .cse0 .cse1 .cse2 (<= main_~b~0 main_~x~0) (= main_~s~0 1)) (and (<= main_~y~0 10) (<= 1 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse0 (< main_~b~0 main_~a~0) .cse1 .cse2))) [2021-05-06 02:37:35,483 INFO L198 CegarLoopUtils]: For program point L43(lines 43 44) no Hoare annotation was computed. [2021-05-06 02:37:35,483 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:37:35,483 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:37:35,483 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:37:35,483 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:37:35,483 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:37:35,483 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:37:35,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:37:35 BoogieIcfgContainer [2021-05-06 02:37:35,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:37:35,507 INFO L168 Benchmark]: Toolchain (without parser) took 47590.16 ms. Allocated memory was 223.3 MB in the beginning and 577.8 MB in the end (delta: 354.4 MB). Free memory was 187.9 MB in the beginning and 297.4 MB in the end (delta: -109.5 MB). Peak memory consumption was 340.2 MB. Max. memory is 8.0 GB. [2021-05-06 02:37:35,507 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 223.3 MB. Free memory is still 204.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:37:35,507 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.47 ms. Allocated memory is still 223.3 MB. Free memory was 187.6 MB in the beginning and 205.9 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:37:35,507 INFO L168 Benchmark]: Boogie Preprocessor took 33.25 ms. Allocated memory is still 223.3 MB. Free memory was 205.9 MB in the beginning and 204.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:37:35,507 INFO L168 Benchmark]: RCFGBuilder took 273.74 ms. Allocated memory is still 223.3 MB. Free memory was 204.5 MB in the beginning and 187.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:37:35,507 INFO L168 Benchmark]: TraceAbstraction took 47060.48 ms. Allocated memory was 223.3 MB in the beginning and 577.8 MB in the end (delta: 354.4 MB). Free memory was 187.1 MB in the beginning and 297.4 MB in the end (delta: -110.3 MB). Peak memory consumption was 340.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:37:35,507 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 223.3 MB. Free memory is still 204.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 217.47 ms. Allocated memory is still 223.3 MB. Free memory was 187.6 MB in the beginning and 205.9 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.25 ms. Allocated memory is still 223.3 MB. Free memory was 205.9 MB in the beginning and 204.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 273.74 ms. Allocated memory is still 223.3 MB. Free memory was 204.5 MB in the beginning and 187.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 47060.48 ms. Allocated memory was 223.3 MB in the beginning and 577.8 MB in the end (delta: 354.4 MB). Free memory was 187.1 MB in the beginning and 297.4 MB in the end (delta: -110.3 MB). Peak memory consumption was 340.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19622.2ms, OverallIterations: 24, TraceHistogramMax: 12, EmptinessCheckTime: 48.1ms, AutomataDifference: 7198.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 27319.1ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1165 SDtfs, 1087 SDslu, 6120 SDs, 0 SdLazy, 6390 SolverSat, 871 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3603.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1620 GetRequests, 1305 SyntacticMatches, 7 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 4199.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=518occurred in iteration=23, InterpolantAutomatonStates: 252, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 601.3ms AutomataMinimizationTime, 24 MinimizatonAttempts, 554 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 385 PreInvPairs, 788 NumberOfFragments, 779 HoareAnnotationTreeSize, 385 FomulaSimplifications, 8963282 FormulaSimplificationTreeSizeReduction, 3024.1ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 1350756 FormulaSimplificationTreeSizeReductionInter, 24268.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 166.9ms SsaConstructionTime, 578.7ms SatisfiabilityAnalysisTime, 5188.3ms InterpolantComputationTime, 1537 NumberOfCodeBlocks, 1493 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1513 ConstructedInterpolants, 0 QuantifiedInterpolants, 7781 SizeOfPredicates, 133 NumberOfNonLiveVariables, 4840 ConjunctsInSsa, 637 ConjunctsInUnsatCore, 24 InterpolantComputations, 7 PerfectInterpolantSequences, 1949/2232 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: ((((((((((r == 0 && y <= 10) && 1 <= x) && b == y) && b == y * s + x * q) && x <= 10) && a <= x) && 1 <= b) && p == 1) && s == 1) && x <= a) || (((((y <= 10 && 1 <= x) && x <= 10) && a == y * r + x * p) && b < a) && 1 <= y) - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: ((((((((y <= 10 && 1 <= x) && b == y * s + x * q) && x <= 10) && a == y * r + x * p) && b < a) && 1 <= y) || ((((((((y <= 10 && 1 <= x) && k == 0) && x <= 10) && b < c) && a == y * r + x * p) && 1 <= y) && !(b == 0)) && c == a)) || ((((((((((((y <= 10 && 1 <= x) && k == 0) && a <= x) && 1 <= b) && r == 0) && b == y) && b == y * s + x * q) && x <= 10) && c == a) && p == 1) && s == 1) && x <= a)) || (((((((((r == 0 && q == 0) && b == y) && x <= 10) && a <= x) && 1 <= b) && p == 1) && b <= x) && x <= a) && s == 1) - InvariantResult [Line: 49]: Loop Invariant Derived loop invariant: (((((((((r == 0 && q == 0) && b == y) && a == x) && x <= 10) && a == y * r + x * p) && 1 <= y) && b <= x) && s == 1) || ((((((y <= 10 && 1 <= x) && b == y * s + x * q) && x <= 10) && b < a) && a == y * r + x * p) && 1 <= y)) || ((((((((((y <= 10 && 1 <= x) && k == 0) && x <= 10) && a == y * r + x * p) && b < a) && b == v) && !(b == 0)) && c == a) && 1 <= y) && d == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...