/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/egcd2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:33:56,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:33:56,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:33:56,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:33:56,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:33:56,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:33:56,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:33:56,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:33:56,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:33:56,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:33:56,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:33:56,233 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:33:56,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:33:56,235 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:33:56,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:33:56,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:33:56,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:33:56,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:33:56,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:33:56,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:33:56,243 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 02:33:56,258 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:33:56,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:33:56,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:33:56,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:33:56,259 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:33:56,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:33:56,259 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:33:56,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:33:56,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:33:56,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:33:56,260 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:33:56,260 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:33:56,260 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:33:56,260 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:33:56,260 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:33:56,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:33:56,260 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:33:56,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:33:56,261 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:33:56,261 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:33:56,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:33:56,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:33:56,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:33:56,261 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:33:56,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:33:56,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:33:56,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:33:56,262 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:33:56,262 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:33:56,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:33:56,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:33:56,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:33:56,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:33:56,511 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:33:56,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2021-05-06 02:33:56,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/849ec9812/54e901a8494b45da91c656bcc0a4d7b8/FLAGd714454e7 [2021-05-06 02:33:56,906 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:33:56,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2021-05-06 02:33:56,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/849ec9812/54e901a8494b45da91c656bcc0a4d7b8/FLAGd714454e7 [2021-05-06 02:33:56,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/849ec9812/54e901a8494b45da91c656bcc0a4d7b8 [2021-05-06 02:33:56,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:33:56,925 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:33:56,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:33:56,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:33:56,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:33:56,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:33:56" (1/1) ... [2021-05-06 02:33:56,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14cb8bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:56, skipping insertion in model container [2021-05-06 02:33:56,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:33:56" (1/1) ... [2021-05-06 02:33:56,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:33:56,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:33:57,022 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/egcd2-ll_valuebound5.c[490,503] [2021-05-06 02:33:57,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:33:57,053 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:33:57,067 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/egcd2-ll_valuebound5.c[490,503] [2021-05-06 02:33:57,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:33:57,107 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:33:57,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57 WrapperNode [2021-05-06 02:33:57,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:33:57,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:33:57,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:33:57,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:33:57,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57" (1/1) ... [2021-05-06 02:33:57,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57" (1/1) ... [2021-05-06 02:33:57,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57" (1/1) ... [2021-05-06 02:33:57,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57" (1/1) ... [2021-05-06 02:33:57,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57" (1/1) ... [2021-05-06 02:33:57,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57" (1/1) ... [2021-05-06 02:33:57,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57" (1/1) ... [2021-05-06 02:33:57,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:33:57,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:33:57,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:33:57,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:33:57,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57" (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 02:33:57,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:33:57,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:33:57,204 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:33:57,204 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:33:57,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:33:57,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:33:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:33:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:33:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:33:57,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:33:57,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:33:57,206 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:33:57,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:33:57,206 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:33:57,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:33:57,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:33:57,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:33:57,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:33:57,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:33:57,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:33:57,466 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:33:57,466 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:33:57,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:33:57 BoogieIcfgContainer [2021-05-06 02:33:57,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:33:57,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:33:57,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:33:57,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:33:57,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:33:56" (1/3) ... [2021-05-06 02:33:57,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75837ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:33:57, skipping insertion in model container [2021-05-06 02:33:57,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:33:57" (2/3) ... [2021-05-06 02:33:57,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75837ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:33:57, skipping insertion in model container [2021-05-06 02:33:57,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:33:57" (3/3) ... [2021-05-06 02:33:57,472 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2021-05-06 02:33:57,476 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:33:57,478 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:33:57,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:33:57,520 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:33:57,520 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:33:57,520 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:33:57,520 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:33:57,520 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:33:57,520 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:33:57,520 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:33:57,520 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:33:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 02:33:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:33:57,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:33:57,534 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 02:33:57,535 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:33:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:33:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2021-05-06 02:33:57,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:33:57,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810274515] [2021-05-06 02:33:57,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:33:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:57,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:33:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:57,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:33:57,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:57,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:33:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:57,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:33:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:57,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:33:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:57,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 02:33:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:57,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 02:33:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 02:33:57,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:33:57,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810274515] [2021-05-06 02:33:57,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810274515] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:33:57,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:33:57,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:33:57,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53927752] [2021-05-06 02:33:57,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:33:57,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:33:57,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:33:57,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:33:57,730 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:33:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:33:57,838 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-05-06 02:33:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:33:57,841 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-06 02:33:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:33:57,846 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:33:57,846 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:33:57,848 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:33:57,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:33:57,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:33:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:33:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 02:33:57,897 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 02:33:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:33:57,897 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 02:33:57,898 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, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:33:57,898 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 02:33:57,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:33:57,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:33:57,899 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 02:33:57,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:33:57,900 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:33:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:33:57,900 INFO L82 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2021-05-06 02:33:57,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:33:57,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570449755] [2021-05-06 02:33:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:33:57,934 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:33:57,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40267311] [2021-05-06 02:33:57,934 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 02:33:58,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:33:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:33:58,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:33:58,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:33:58,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570449755] [2021-05-06 02:33:58,199 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:33:58,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40267311] [2021-05-06 02:33:58,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40267311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:33:58,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:33:58,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:33:58,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957536039] [2021-05-06 02:33:58,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:33:58,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:33:58,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:33:58,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:33:58,202 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:33:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:33:58,321 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-05-06 02:33:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:33:58,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 02:33:58,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:33:58,324 INFO L225 Difference]: With dead ends: 52 [2021-05-06 02:33:58,324 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 02:33:58,326 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:33:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 02:33:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 02:33:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:33:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 02:33:58,347 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 02:33:58,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:33:58,347 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 02:33:58,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:33:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 02:33:58,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 02:33:58,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:33:58,348 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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 02:33:58,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:33:58,549 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:33:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:33:58,550 INFO L82 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2021-05-06 02:33:58,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:33:58,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963351828] [2021-05-06 02:33:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:33:58,562 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:33:58,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396084820] [2021-05-06 02:33:58,562 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 02:33:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:58,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:33:58,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:33:58,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:33:58,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:33:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963351828] [2021-05-06 02:33:58,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:33:58,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396084820] [2021-05-06 02:33:58,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396084820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:33:58,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:33:58,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:33:58,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166950288] [2021-05-06 02:33:58,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:33:58,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:33:58,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:33:58,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:33:58,764 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 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 02:33:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:33:58,912 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-06 02:33:58,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:33:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 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 45 [2021-05-06 02:33:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:33:58,913 INFO L225 Difference]: With dead ends: 57 [2021-05-06 02:33:58,913 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 02:33:58,914 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:33:58,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 02:33:58,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 02:33:58,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:33:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 02:33:58,934 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 02:33:58,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:33:58,934 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 02:33:58,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 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 02:33:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 02:33:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 02:33:58,935 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:33:58,935 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-06 02:33:59,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:33:59,138 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:33:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:33:59,138 INFO L82 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2021-05-06 02:33:59,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:33:59,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596493381] [2021-05-06 02:33:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:33:59,148 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:33:59,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196813012] [2021-05-06 02:33:59,148 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 02:33:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:59,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:33:59,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:33:59,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 02:33:59,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:33:59,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596493381] [2021-05-06 02:33:59,340 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:33:59,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196813012] [2021-05-06 02:33:59,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196813012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:33:59,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:33:59,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:33:59,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092500892] [2021-05-06 02:33:59,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:33:59,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:33:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:33:59,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:33:59,342 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:33:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:33:59,486 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-06 02:33:59,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:33:59,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2021-05-06 02:33:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:33:59,488 INFO L225 Difference]: With dead ends: 56 [2021-05-06 02:33:59,488 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 02:33:59,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:33:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 02:33:59,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 02:33:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:33:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 02:33:59,495 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 02:33:59,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:33:59,495 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 02:33:59,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:33:59,496 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 02:33:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 02:33:59,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:33:59,496 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2021-05-06 02:33:59,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:33:59,709 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:33:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:33:59,709 INFO L82 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2021-05-06 02:33:59,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:33:59,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746142701] [2021-05-06 02:33:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:33:59,719 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:33:59,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776185209] [2021-05-06 02:33:59,719 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 02:33:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:33:59,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:33:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:33:59,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 02:33:59,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:33:59,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746142701] [2021-05-06 02:33:59,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:33:59,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776185209] [2021-05-06 02:33:59,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776185209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:33:59,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:33:59,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:33:59,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981008450] [2021-05-06 02:33:59,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:33:59,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:33:59,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:33:59,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:33:59,967 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:34:00,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:00,076 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2021-05-06 02:34:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:34:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 02:34:00,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:00,077 INFO L225 Difference]: With dead ends: 60 [2021-05-06 02:34:00,077 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 02:34:00,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:34:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 02:34:00,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 02:34:00,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:34:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 02:34:00,090 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 02:34:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:00,091 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 02:34:00,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:34:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 02:34:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 02:34:00,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:00,092 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2021-05-06 02:34:00,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:00,292 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2021-05-06 02:34:00,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:00,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15180557] [2021-05-06 02:34:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:00,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:00,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950640815] [2021-05-06 02:34:00,303 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 02:34:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:00,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:34:00,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:00,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,485 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 02:34:00,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:00,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15180557] [2021-05-06 02:34:00,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:00,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950640815] [2021-05-06 02:34:00,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950640815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:00,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:00,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:34:00,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016647318] [2021-05-06 02:34:00,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:34:00,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:00,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:34:00,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:00,489 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 02:34:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:00,581 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-06 02:34:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:34:00,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2021-05-06 02:34:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:00,582 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:34:00,582 INFO L226 Difference]: Without dead ends: 62 [2021-05-06 02:34:00,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:34:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-06 02:34:00,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-06 02:34:00,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:34:00,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 02:34:00,589 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 02:34:00,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:00,589 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 02:34:00,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 02:34:00,590 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 02:34:00,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 02:34:00,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:00,590 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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] [2021-05-06 02:34:00,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:34:00,791 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:00,791 INFO L82 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2021-05-06 02:34:00,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:00,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898475409] [2021-05-06 02:34:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:00,801 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:00,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161852647] [2021-05-06 02:34:00,801 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 02:34:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:00,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:34:00,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:00,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:00,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:34:01,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:01,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898475409] [2021-05-06 02:34:01,041 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:01,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161852647] [2021-05-06 02:34:01,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161852647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:01,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:01,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:34:01,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410415519] [2021-05-06 02:34:01,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:34:01,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:01,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:34:01,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:34:01,042 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:01,211 INFO L93 Difference]: Finished difference Result 80 states and 101 transitions. [2021-05-06 02:34:01,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:34:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-06 02:34:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:01,213 INFO L225 Difference]: With dead ends: 80 [2021-05-06 02:34:01,213 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 02:34:01,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:01,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 02:34:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 02:34:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:34:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 02:34:01,223 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 02:34:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:01,223 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 02:34:01,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:01,223 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 02:34:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:34:01,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:01,224 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:01,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:01,438 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:01,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:01,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2021-05-06 02:34:01,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:01,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060152296] [2021-05-06 02:34:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:01,447 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:01,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862332954] [2021-05-06 02:34:01,447 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 02:34:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:01,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:34:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:01,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:34:01,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:01,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060152296] [2021-05-06 02:34:01,611 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:01,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862332954] [2021-05-06 02:34:01,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862332954] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:01,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:01,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:34:01,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910151005] [2021-05-06 02:34:01,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:34:01,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:01,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:34:01,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:34:01,612 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:01,729 INFO L93 Difference]: Finished difference Result 112 states and 152 transitions. [2021-05-06 02:34:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:34:01,729 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-06 02:34:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:01,730 INFO L225 Difference]: With dead ends: 112 [2021-05-06 02:34:01,730 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 02:34:01,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:34:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 02:34:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2021-05-06 02:34:01,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 35 states have call successors, (35), 9 states have call predecessors, (35), 8 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 02:34:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-05-06 02:34:01,742 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 69 [2021-05-06 02:34:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:01,742 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-05-06 02:34:01,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:01,742 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-05-06 02:34:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-06 02:34:01,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:01,743 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1] [2021-05-06 02:34:01,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:01,961 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash -622831482, now seen corresponding path program 1 times [2021-05-06 02:34:01,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:01,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082432843] [2021-05-06 02:34:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:01,969 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:01,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253085596] [2021-05-06 02:34:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:02,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:34:02,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:02,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 02:34:02,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:02,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082432843] [2021-05-06 02:34:02,158 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:02,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253085596] [2021-05-06 02:34:02,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253085596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:02,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:02,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:34:02,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386143693] [2021-05-06 02:34:02,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:34:02,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:02,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:34:02,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:34:02,160 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:02,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:02,383 INFO L93 Difference]: Finished difference Result 111 states and 149 transitions. [2021-05-06 02:34:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:34:02,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2021-05-06 02:34:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:02,385 INFO L225 Difference]: With dead ends: 111 [2021-05-06 02:34:02,385 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 02:34:02,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:34:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 02:34:02,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2021-05-06 02:34:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 56 states have internal predecessors, (63), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 02:34:02,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2021-05-06 02:34:02,397 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 70 [2021-05-06 02:34:02,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:02,397 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2021-05-06 02:34:02,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:34:02,397 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2021-05-06 02:34:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 02:34:02,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:02,398 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:02,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:34:02,613 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:02,613 INFO L82 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2021-05-06 02:34:02,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:02,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136142848] [2021-05-06 02:34:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:02,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:02,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417614095] [2021-05-06 02:34:02,624 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 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 02:34:02,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:02,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:34:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:02,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:34:02,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:02,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136142848] [2021-05-06 02:34:02,837 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:02,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417614095] [2021-05-06 02:34:02,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417614095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:02,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:02,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:34:02,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624118043] [2021-05-06 02:34:02,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:34:02,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:02,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:34:02,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:34:02,838 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:34:02,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:02,939 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2021-05-06 02:34:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:34:02,951 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2021-05-06 02:34:02,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:02,952 INFO L225 Difference]: With dead ends: 109 [2021-05-06 02:34:02,952 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:34:02,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:34:02,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:34:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-06 02:34:02,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 61 states have internal predecessors, (67), 37 states have call successors, (37), 11 states have call predecessors, (37), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 02:34:02,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2021-05-06 02:34:02,965 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 75 [2021-05-06 02:34:02,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:02,965 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2021-05-06 02:34:02,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:34:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2021-05-06 02:34:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:34:02,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:02,966 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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 02:34:03,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:03,181 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:03,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:03,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2021-05-06 02:34:03,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:03,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063316376] [2021-05-06 02:34:03,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:03,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:03,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225049456] [2021-05-06 02:34:03,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:03,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:34:03,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:03,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:34:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-05-06 02:34:03,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:03,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063316376] [2021-05-06 02:34:03,525 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:03,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225049456] [2021-05-06 02:34:03,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225049456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:03,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:03,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:34:03,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112730269] [2021-05-06 02:34:03,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:34:03,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:34:03,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:34:03,527 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:34:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:03,769 INFO L93 Difference]: Finished difference Result 134 states and 175 transitions. [2021-05-06 02:34:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:34:03,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-06 02:34:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:03,773 INFO L225 Difference]: With dead ends: 134 [2021-05-06 02:34:03,773 INFO L226 Difference]: Without dead ends: 132 [2021-05-06 02:34:03,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:34:03,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-06 02:34:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-05-06 02:34:03,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 74 states have internal predecessors, (82), 45 states have call successors, (45), 13 states have call predecessors, (45), 12 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 02:34:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2021-05-06 02:34:03,794 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 80 [2021-05-06 02:34:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:03,794 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2021-05-06 02:34:03,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:34:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2021-05-06 02:34:03,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:34:03,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:03,796 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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] [2021-05-06 02:34:04,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:04,009 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:04,009 INFO L82 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 4 times [2021-05-06 02:34:04,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:04,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772480707] [2021-05-06 02:34:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:04,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:04,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820657257] [2021-05-06 02:34:04,016 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 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 02:34:04,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:34:04,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:04,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 02:34:04,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:04,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-05-06 02:34:04,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:04,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772480707] [2021-05-06 02:34:04,335 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:04,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820657257] [2021-05-06 02:34:04,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820657257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:04,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:04,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:34:04,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948906912] [2021-05-06 02:34:04,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:34:04,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:04,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:34:04,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:34:04,337 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:34:04,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:04,577 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2021-05-06 02:34:04,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:34:04,577 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 85 [2021-05-06 02:34:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:04,578 INFO L225 Difference]: With dead ends: 138 [2021-05-06 02:34:04,578 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 02:34:04,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:04,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 02:34:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 02:34:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 77 states have internal predecessors, (85), 45 states have call successors, (45), 14 states have call predecessors, (45), 13 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2021-05-06 02:34:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2021-05-06 02:34:04,591 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 85 [2021-05-06 02:34:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:04,592 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2021-05-06 02:34:04,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:34:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2021-05-06 02:34:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 02:34:04,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:04,593 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 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 02:34:04,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:34:04,809 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:04,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:04,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1507900548, now seen corresponding path program 2 times [2021-05-06 02:34:04,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:04,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027837296] [2021-05-06 02:34:04,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:04,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:04,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148391663] [2021-05-06 02:34:04,816 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 02:34:04,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:04,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 02:34:04,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:04,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 55 proven. 40 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-05-06 02:34:05,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:05,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027837296] [2021-05-06 02:34:05,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:05,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148391663] [2021-05-06 02:34:05,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148391663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:05,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:05,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:34:05,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743154423] [2021-05-06 02:34:05,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:34:05,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:05,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:34:05,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:05,229 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:34:05,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:05,581 INFO L93 Difference]: Finished difference Result 152 states and 200 transitions. [2021-05-06 02:34:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:34:05,582 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 89 [2021-05-06 02:34:05,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:05,583 INFO L225 Difference]: With dead ends: 152 [2021-05-06 02:34:05,583 INFO L226 Difference]: Without dead ends: 150 [2021-05-06 02:34:05,583 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:34:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-06 02:34:05,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2021-05-06 02:34:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.1518987341772151) internal successors, (91), 82 states have internal predecessors, (91), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:34:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 187 transitions. [2021-05-06 02:34:05,597 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 187 transitions. Word has length 89 [2021-05-06 02:34:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:05,597 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 187 transitions. [2021-05-06 02:34:05,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:34:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 187 transitions. [2021-05-06 02:34:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 02:34:05,598 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:05,598 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1] [2021-05-06 02:34:05,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:34:05,813 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2021-05-06 02:34:05,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:05,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393382137] [2021-05-06 02:34:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:05,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:05,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668441714] [2021-05-06 02:34:05,819 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 02:34:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:05,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 02:34:05,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:06,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-06 02:34:06,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:06,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393382137] [2021-05-06 02:34:06,098 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:06,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668441714] [2021-05-06 02:34:06,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668441714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:06,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:06,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:34:06,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60220290] [2021-05-06 02:34:06,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:34:06,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:34:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:34:06,099 INFO L87 Difference]: Start difference. First operand 143 states and 187 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:34:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:06,403 INFO L93 Difference]: Finished difference Result 169 states and 220 transitions. [2021-05-06 02:34:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:34:06,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 02:34:06,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:06,404 INFO L225 Difference]: With dead ends: 169 [2021-05-06 02:34:06,404 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 02:34:06,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:34:06,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 02:34:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 156. [2021-05-06 02:34:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 53 states have call successors, (53), 16 states have call predecessors, (53), 15 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-06 02:34:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 204 transitions. [2021-05-06 02:34:06,419 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 204 transitions. Word has length 91 [2021-05-06 02:34:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:06,419 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 204 transitions. [2021-05-06 02:34:06,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 02:34:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 204 transitions. [2021-05-06 02:34:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 02:34:06,420 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:06,420 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:06,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 02:34:06,633 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:06,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1307252997, now seen corresponding path program 1 times [2021-05-06 02:34:06,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:06,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738665428] [2021-05-06 02:34:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:06,639 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:06,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209861073] [2021-05-06 02:34:06,639 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 02:34:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:34:06,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:06,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-06 02:34:06,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:06,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738665428] [2021-05-06 02:34:06,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:06,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209861073] [2021-05-06 02:34:06,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209861073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:06,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:06,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:34:06,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372331800] [2021-05-06 02:34:06,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:34:06,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:06,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:34:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:34:06,820 INFO L87 Difference]: Start difference. First operand 156 states and 204 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:34:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:06,882 INFO L93 Difference]: Finished difference Result 197 states and 271 transitions. [2021-05-06 02:34:06,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:34:06,883 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2021-05-06 02:34:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:06,884 INFO L225 Difference]: With dead ends: 197 [2021-05-06 02:34:06,884 INFO L226 Difference]: Without dead ends: 195 [2021-05-06 02:34:06,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-06 02:34:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-05-06 02:34:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 97 states have (on average 1.1546391752577319) internal successors, (112), 103 states have internal predecessors, (112), 62 states have call successors, (62), 17 states have call predecessors, (62), 16 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-06 02:34:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 234 transitions. [2021-05-06 02:34:06,903 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 234 transitions. Word has length 92 [2021-05-06 02:34:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:06,904 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 234 transitions. [2021-05-06 02:34:06,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:34:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 234 transitions. [2021-05-06 02:34:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 02:34:06,904 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:06,904 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 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, 1] [2021-05-06 02:34:07,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:07,124 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash 703654790, now seen corresponding path program 5 times [2021-05-06 02:34:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:07,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064286139] [2021-05-06 02:34:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:07,130 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:07,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132144882] [2021-05-06 02:34:07,130 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 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 02:34:07,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 02:34:07,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:07,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:34:07,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:07,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 02:34:07,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:07,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064286139] [2021-05-06 02:34:07,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:07,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132144882] [2021-05-06 02:34:07,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132144882] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:34:07,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:34:07,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:34:07,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679940301] [2021-05-06 02:34:07,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:34:07,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:07,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:34:07,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:34:07,327 INFO L87 Difference]: Start difference. First operand 176 states and 234 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:34:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:07,381 INFO L93 Difference]: Finished difference Result 222 states and 294 transitions. [2021-05-06 02:34:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:34:07,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-06 02:34:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:07,382 INFO L225 Difference]: With dead ends: 222 [2021-05-06 02:34:07,382 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 02:34:07,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 02:34:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2021-05-06 02:34:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 89 states have internal predecessors, (92), 49 states have call successors, (49), 17 states have call predecessors, (49), 16 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:34:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2021-05-06 02:34:07,397 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 105 [2021-05-06 02:34:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:07,397 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2021-05-06 02:34:07,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:34:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2021-05-06 02:34:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 02:34:07,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:07,398 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:07,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:34:07,612 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2021-05-06 02:34:07,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:07,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335940447] [2021-05-06 02:34:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:07,618 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:07,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665229097] [2021-05-06 02:34:07,618 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 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 02:34:07,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:07,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 02:34:07,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:07,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:07,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 87 proven. 37 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-06 02:34:08,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:08,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335940447] [2021-05-06 02:34:08,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:08,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665229097] [2021-05-06 02:34:08,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665229097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:08,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:08,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:34:08,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433638119] [2021-05-06 02:34:08,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:34:08,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:34:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:34:08,067 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 02:34:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:08,475 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2021-05-06 02:34:08,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:34:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2021-05-06 02:34:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:08,476 INFO L225 Difference]: With dead ends: 162 [2021-05-06 02:34:08,476 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 02:34:08,477 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 02:34:08,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-05-06 02:34:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 49 states have call successors, (49), 19 states have call predecessors, (49), 18 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:34:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2021-05-06 02:34:08,492 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 107 [2021-05-06 02:34:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:08,493 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2021-05-06 02:34:08,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 02:34:08,493 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2021-05-06 02:34:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 02:34:08,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:08,494 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:08,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:34:08,697 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1483033219, now seen corresponding path program 3 times [2021-05-06 02:34:08,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:08,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493016638] [2021-05-06 02:34:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:08,728 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:08,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368042691] [2021-05-06 02:34:08,728 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 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 02:34:08,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:34:08,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:08,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 02:34:08,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:08,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-05-06 02:34:08,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:08,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493016638] [2021-05-06 02:34:08,912 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:08,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368042691] [2021-05-06 02:34:08,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368042691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:08,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:08,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:34:08,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787952276] [2021-05-06 02:34:08,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:34:08,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:08,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:34:08,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:08,914 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:34:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:08,979 INFO L93 Difference]: Finished difference Result 164 states and 199 transitions. [2021-05-06 02:34:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:34:08,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 111 [2021-05-06 02:34:08,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:08,981 INFO L225 Difference]: With dead ends: 164 [2021-05-06 02:34:08,981 INFO L226 Difference]: Without dead ends: 162 [2021-05-06 02:34:08,982 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:34:08,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-06 02:34:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2021-05-06 02:34:08,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 93 states have (on average 1.086021505376344) internal successors, (101), 98 states have internal predecessors, (101), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2021-05-06 02:34:08,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 197 transitions. [2021-05-06 02:34:08,997 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 197 transitions. Word has length 111 [2021-05-06 02:34:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:08,998 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 197 transitions. [2021-05-06 02:34:08,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-05-06 02:34:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 197 transitions. [2021-05-06 02:34:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 02:34:08,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:08,999 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:09,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:09,213 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:09,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 2 times [2021-05-06 02:34:09,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:09,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036678837] [2021-05-06 02:34:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:09,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:09,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700196802] [2021-05-06 02:34:09,219 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 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 02:34:09,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:09,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 02:34:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:09,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:09,524 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 47 proven. 30 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-05-06 02:34:09,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:09,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036678837] [2021-05-06 02:34:09,525 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:09,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700196802] [2021-05-06 02:34:09,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700196802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:09,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:09,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:34:09,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615136225] [2021-05-06 02:34:09,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:34:09,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:09,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:34:09,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:34:09,526 INFO L87 Difference]: Start difference. First operand 162 states and 197 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:34:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:10,065 INFO L93 Difference]: Finished difference Result 196 states and 244 transitions. [2021-05-06 02:34:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:34:10,065 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) Word has length 113 [2021-05-06 02:34:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:10,066 INFO L225 Difference]: With dead ends: 196 [2021-05-06 02:34:10,066 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 02:34:10,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:34:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 02:34:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-05-06 02:34:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 113 states have internal predecessors, (118), 61 states have call successors, (61), 22 states have call predecessors, (61), 21 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:34:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 238 transitions. [2021-05-06 02:34:10,084 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 238 transitions. Word has length 113 [2021-05-06 02:34:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:10,085 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 238 transitions. [2021-05-06 02:34:10,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:34:10,085 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 238 transitions. [2021-05-06 02:34:10,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 02:34:10,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:10,086 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:10,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:10,302 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:10,302 INFO L82 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 3 times [2021-05-06 02:34:10,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:10,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750023245] [2021-05-06 02:34:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:10,310 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:10,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557513320] [2021-05-06 02:34:10,311 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 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 02:34:10,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:34:10,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:10,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:34:10,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:10,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-06 02:34:10,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:10,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750023245] [2021-05-06 02:34:10,514 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:10,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557513320] [2021-05-06 02:34:10,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557513320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:10,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:10,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:34:10,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885214377] [2021-05-06 02:34:10,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:34:10,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:10,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:34:10,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:34:10,515 INFO L87 Difference]: Start difference. First operand 191 states and 238 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 02:34:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:10,693 INFO L93 Difference]: Finished difference Result 237 states and 314 transitions. [2021-05-06 02:34:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:34:10,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2021-05-06 02:34:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:10,694 INFO L225 Difference]: With dead ends: 237 [2021-05-06 02:34:10,694 INFO L226 Difference]: Without dead ends: 230 [2021-05-06 02:34:10,695 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:10,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-06 02:34:10,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 210. [2021-05-06 02:34:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 115 states have (on average 1.1217391304347826) internal successors, (129), 116 states have internal predecessors, (129), 73 states have call successors, (73), 22 states have call predecessors, (73), 21 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:34:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 273 transitions. [2021-05-06 02:34:10,714 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 273 transitions. Word has length 116 [2021-05-06 02:34:10,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:10,714 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 273 transitions. [2021-05-06 02:34:10,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-05-06 02:34:10,714 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 273 transitions. [2021-05-06 02:34:10,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-06 02:34:10,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:10,715 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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, 1] [2021-05-06 02:34:10,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:10,929 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 3 times [2021-05-06 02:34:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:10,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707207893] [2021-05-06 02:34:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:10,934 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:10,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976952866] [2021-05-06 02:34:10,934 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 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 02:34:10,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:34:10,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-06 02:34:11,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:11,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-05-06 02:34:11,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707207893] [2021-05-06 02:34:11,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976952866] [2021-05-06 02:34:11,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976952866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:11,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:11,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:34:11,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979117486] [2021-05-06 02:34:11,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:34:11,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:11,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:34:11,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:11,330 INFO L87 Difference]: Start difference. First operand 210 states and 273 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:34:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:11,774 INFO L93 Difference]: Finished difference Result 249 states and 323 transitions. [2021-05-06 02:34:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:34:11,775 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2021-05-06 02:34:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:11,776 INFO L225 Difference]: With dead ends: 249 [2021-05-06 02:34:11,777 INFO L226 Difference]: Without dead ends: 247 [2021-05-06 02:34:11,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 246.1ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:34:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-06 02:34:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2021-05-06 02:34:11,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 133 states have (on average 1.1203007518796992) internal successors, (149), 134 states have internal predecessors, (149), 85 states have call successors, (85), 25 states have call predecessors, (85), 24 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:34:11,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 317 transitions. [2021-05-06 02:34:11,799 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 317 transitions. Word has length 127 [2021-05-06 02:34:11,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:11,799 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 317 transitions. [2021-05-06 02:34:11,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:34:11,800 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 317 transitions. [2021-05-06 02:34:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-05-06 02:34:11,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:11,800 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-06 02:34:12,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:34:12,017 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:12,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:12,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 4 times [2021-05-06 02:34:12,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:12,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463835701] [2021-05-06 02:34:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:12,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:12,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944246148] [2021-05-06 02:34:12,022 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 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 02:34:12,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:34:12,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:12,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 02:34:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:12,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 102 proven. 95 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2021-05-06 02:34:12,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:12,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463835701] [2021-05-06 02:34:12,645 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:12,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944246148] [2021-05-06 02:34:12,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944246148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:12,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:12,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:34:12,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190607399] [2021-05-06 02:34:12,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:34:12,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:12,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:34:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:34:12,647 INFO L87 Difference]: Start difference. First operand 243 states and 317 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-06 02:34:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:13,340 INFO L93 Difference]: Finished difference Result 252 states and 325 transitions. [2021-05-06 02:34:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:34:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2021-05-06 02:34:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:13,343 INFO L225 Difference]: With dead ends: 252 [2021-05-06 02:34:13,343 INFO L226 Difference]: Without dead ends: 250 [2021-05-06 02:34:13,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 448.2ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:34:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-06 02:34:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2021-05-06 02:34:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 137 states have internal predecessors, (152), 85 states have call successors, (85), 26 states have call predecessors, (85), 25 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:34:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 320 transitions. [2021-05-06 02:34:13,366 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 320 transitions. Word has length 129 [2021-05-06 02:34:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:13,366 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 320 transitions. [2021-05-06 02:34:13,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2021-05-06 02:34:13,366 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 320 transitions. [2021-05-06 02:34:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 02:34:13,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:13,367 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 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, 1] [2021-05-06 02:34:13,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:34:13,581 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:13,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 5 times [2021-05-06 02:34:13,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:13,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772467230] [2021-05-06 02:34:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:13,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:13,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516207752] [2021-05-06 02:34:13,586 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 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 02:34:13,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:34:13,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 02:34:13,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:13,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:13,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:14,281 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 74 proven. 53 refuted. 0 times theorem prover too weak. 423 trivial. 0 not checked. [2021-05-06 02:34:14,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772467230] [2021-05-06 02:34:14,282 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:14,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516207752] [2021-05-06 02:34:14,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516207752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:14,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:14,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:34:14,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122074527] [2021-05-06 02:34:14,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:34:14,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:14,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:34:14,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:34:14,283 INFO L87 Difference]: Start difference. First operand 247 states and 320 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 02:34:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:15,281 INFO L93 Difference]: Finished difference Result 263 states and 334 transitions. [2021-05-06 02:34:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:34:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2021-05-06 02:34:15,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:15,294 INFO L225 Difference]: With dead ends: 263 [2021-05-06 02:34:15,294 INFO L226 Difference]: Without dead ends: 261 [2021-05-06 02:34:15,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:34:15,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-06 02:34:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 255. [2021-05-06 02:34:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 142 states have (on average 1.1126760563380282) internal successors, (158), 143 states have internal predecessors, (158), 85 states have call successors, (85), 28 states have call predecessors, (85), 27 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:34:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 326 transitions. [2021-05-06 02:34:15,318 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 326 transitions. Word has length 132 [2021-05-06 02:34:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:15,319 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 326 transitions. [2021-05-06 02:34:15,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2021-05-06 02:34:15,319 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 326 transitions. [2021-05-06 02:34:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-06 02:34:15,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:15,319 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:34:15,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:15,529 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 4 times [2021-05-06 02:34:15,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:15,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013774184] [2021-05-06 02:34:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:15,535 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:15,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182943833] [2021-05-06 02:34:15,535 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 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 02:34:15,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:34:15,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:15,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 02:34:15,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:15,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:15,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:16,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:16,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:16,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 121 proven. 108 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-05-06 02:34:16,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:16,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013774184] [2021-05-06 02:34:16,082 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:16,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182943833] [2021-05-06 02:34:16,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182943833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:16,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:16,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:34:16,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204959088] [2021-05-06 02:34:16,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:34:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:16,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:34:16,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:34:16,083 INFO L87 Difference]: Start difference. First operand 255 states and 326 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 02:34:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:16,578 INFO L93 Difference]: Finished difference Result 317 states and 404 transitions. [2021-05-06 02:34:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:34:16,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 135 [2021-05-06 02:34:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:16,584 INFO L225 Difference]: With dead ends: 317 [2021-05-06 02:34:16,584 INFO L226 Difference]: Without dead ends: 266 [2021-05-06 02:34:16,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 325.4ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:34:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-06 02:34:16,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-05-06 02:34:16,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 147 states have (on average 1.1088435374149659) internal successors, (163), 148 states have internal predecessors, (163), 89 states have call successors, (89), 29 states have call predecessors, (89), 28 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2021-05-06 02:34:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 339 transitions. [2021-05-06 02:34:16,608 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 339 transitions. Word has length 135 [2021-05-06 02:34:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:16,608 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 339 transitions. [2021-05-06 02:34:16,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 02:34:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 339 transitions. [2021-05-06 02:34:16,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 02:34:16,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:16,609 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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 02:34:16,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:34:16,825 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:16,826 INFO L82 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 5 times [2021-05-06 02:34:16,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:16,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420696842] [2021-05-06 02:34:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:16,833 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:16,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282931805] [2021-05-06 02:34:16,833 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:16,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:34:16,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:16,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-06 02:34:16,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:17,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 85 proven. 134 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-05-06 02:34:17,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:17,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420696842] [2021-05-06 02:34:17,421 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:17,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282931805] [2021-05-06 02:34:17,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282931805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:17,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:17,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:34:17,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38933958] [2021-05-06 02:34:17,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:34:17,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:17,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:34:17,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:34:17,422 INFO L87 Difference]: Start difference. First operand 265 states and 339 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 02:34:18,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:18,406 INFO L93 Difference]: Finished difference Result 311 states and 402 transitions. [2021-05-06 02:34:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:34:18,407 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 138 [2021-05-06 02:34:18,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:18,409 INFO L225 Difference]: With dead ends: 311 [2021-05-06 02:34:18,409 INFO L226 Difference]: Without dead ends: 304 [2021-05-06 02:34:18,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:34:18,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-06 02:34:18,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 279. [2021-05-06 02:34:18,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 155 states have (on average 1.1096774193548387) internal successors, (172), 156 states have internal predecessors, (172), 93 states have call successors, (93), 31 states have call predecessors, (93), 30 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2021-05-06 02:34:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 356 transitions. [2021-05-06 02:34:18,444 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 356 transitions. Word has length 138 [2021-05-06 02:34:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:18,444 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 356 transitions. [2021-05-06 02:34:18,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2021-05-06 02:34:18,444 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 356 transitions. [2021-05-06 02:34:18,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 02:34:18,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:18,445 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-05-06 02:34:18,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:18,654 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:18,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:18,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1351165176, now seen corresponding path program 6 times [2021-05-06 02:34:18,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:18,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671040908] [2021-05-06 02:34:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:18,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:18,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852875216] [2021-05-06 02:34:18,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:18,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 02:34:18,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:18,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-06 02:34:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:18,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:18,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 89 proven. 72 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2021-05-06 02:34:19,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671040908] [2021-05-06 02:34:19,405 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:19,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852875216] [2021-05-06 02:34:19,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852875216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:19,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:19,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:34:19,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424820919] [2021-05-06 02:34:19,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 02:34:19,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:19,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 02:34:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:34:19,408 INFO L87 Difference]: Start difference. First operand 279 states and 356 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-06 02:34:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:20,479 INFO L93 Difference]: Finished difference Result 318 states and 406 transitions. [2021-05-06 02:34:20,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 02:34:20,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) Word has length 149 [2021-05-06 02:34:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:20,481 INFO L225 Difference]: With dead ends: 318 [2021-05-06 02:34:20,481 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 02:34:20,481 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 646.0ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-05-06 02:34:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 02:34:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2021-05-06 02:34:20,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 173 states have (on average 1.1098265895953756) internal successors, (192), 174 states have internal predecessors, (192), 105 states have call successors, (105), 34 states have call predecessors, (105), 33 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-06 02:34:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 400 transitions. [2021-05-06 02:34:20,511 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 400 transitions. Word has length 149 [2021-05-06 02:34:20,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:20,511 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 400 transitions. [2021-05-06 02:34:20,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 9 states have call predecessors, (25), 8 states have call successors, (25) [2021-05-06 02:34:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 400 transitions. [2021-05-06 02:34:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 02:34:20,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:20,512 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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] [2021-05-06 02:34:20,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:34:20,716 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:20,716 INFO L82 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 7 times [2021-05-06 02:34:20,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:20,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647052726] [2021-05-06 02:34:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:20,722 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:20,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1795882] [2021-05-06 02:34:20,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:20,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 02:34:20,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:20,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:20,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 97 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-06 02:34:21,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:21,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647052726] [2021-05-06 02:34:21,362 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:21,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795882] [2021-05-06 02:34:21,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:21,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:21,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 02:34:21,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333014368] [2021-05-06 02:34:21,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 02:34:21,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:21,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 02:34:21,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:34:21,363 INFO L87 Difference]: Start difference. First operand 312 states and 400 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:34:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:22,297 INFO L93 Difference]: Finished difference Result 351 states and 450 transitions. [2021-05-06 02:34:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:34:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) Word has length 149 [2021-05-06 02:34:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:22,299 INFO L225 Difference]: With dead ends: 351 [2021-05-06 02:34:22,299 INFO L226 Difference]: Without dead ends: 349 [2021-05-06 02:34:22,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 419.9ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:34:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-05-06 02:34:22,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2021-05-06 02:34:22,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 191 states have (on average 1.1099476439790577) internal successors, (212), 192 states have internal predecessors, (212), 117 states have call successors, (117), 37 states have call predecessors, (117), 36 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 02:34:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 444 transitions. [2021-05-06 02:34:22,333 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 444 transitions. Word has length 149 [2021-05-06 02:34:22,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:22,333 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 444 transitions. [2021-05-06 02:34:22,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:34:22,333 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 444 transitions. [2021-05-06 02:34:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 02:34:22,334 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:22,334 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-06 02:34:22,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:22,547 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:22,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 8 times [2021-05-06 02:34:22,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:22,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418964843] [2021-05-06 02:34:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:22,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:22,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741852194] [2021-05-06 02:34:22,552 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:22,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:34:22,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 71 conjunts are in the unsatisfiable core [2021-05-06 02:34:22,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:22,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:22,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 99 proven. 128 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2021-05-06 02:34:23,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:23,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418964843] [2021-05-06 02:34:23,603 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:23,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741852194] [2021-05-06 02:34:23,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741852194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:23,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:23,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 02:34:23,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956518848] [2021-05-06 02:34:23,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 02:34:23,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:23,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 02:34:23,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:34:23,604 INFO L87 Difference]: Start difference. First operand 345 states and 444 transitions. Second operand has 22 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 02:34:25,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:25,087 INFO L93 Difference]: Finished difference Result 361 states and 458 transitions. [2021-05-06 02:34:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 02:34:25,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) Word has length 154 [2021-05-06 02:34:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:25,089 INFO L225 Difference]: With dead ends: 361 [2021-05-06 02:34:25,089 INFO L226 Difference]: Without dead ends: 359 [2021-05-06 02:34:25,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 983.6ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-05-06 02:34:25,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-05-06 02:34:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 353. [2021-05-06 02:34:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 197 states have (on average 1.1065989847715736) internal successors, (218), 198 states have internal predecessors, (218), 117 states have call successors, (117), 39 states have call predecessors, (117), 38 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2021-05-06 02:34:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 450 transitions. [2021-05-06 02:34:25,124 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 450 transitions. Word has length 154 [2021-05-06 02:34:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:25,125 INFO L480 AbstractCegarLoop]: Abstraction has 353 states and 450 transitions. [2021-05-06 02:34:25,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 1.85) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 11 states have call predecessors, (26), 10 states have call successors, (26) [2021-05-06 02:34:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 450 transitions. [2021-05-06 02:34:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-06 02:34:25,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:25,126 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-06 02:34:25,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 02:34:25,343 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:25,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:25,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 9 times [2021-05-06 02:34:25,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:25,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088056237] [2021-05-06 02:34:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:25,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:25,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391351263] [2021-05-06 02:34:25,348 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:25,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:34:25,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 02:34:25,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:25,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 132 proven. 65 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2021-05-06 02:34:25,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:25,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088056237] [2021-05-06 02:34:25,955 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:25,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391351263] [2021-05-06 02:34:25,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391351263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:25,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:25,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:34:25,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562530439] [2021-05-06 02:34:25,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:34:25,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:25,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:34:25,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:34:25,956 INFO L87 Difference]: Start difference. First operand 353 states and 450 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 02:34:27,866 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-06 02:34:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:28,742 INFO L93 Difference]: Finished difference Result 425 states and 545 transitions. [2021-05-06 02:34:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:34:28,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) Word has length 154 [2021-05-06 02:34:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:28,744 INFO L225 Difference]: With dead ends: 425 [2021-05-06 02:34:28,744 INFO L226 Difference]: Without dead ends: 423 [2021-05-06 02:34:28,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 717.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:34:28,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-06 02:34:28,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 419. [2021-05-06 02:34:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 233 states have (on average 1.111587982832618) internal successors, (259), 234 states have internal predecessors, (259), 141 states have call successors, (141), 45 states have call predecessors, (141), 44 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 02:34:28,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 539 transitions. [2021-05-06 02:34:28,789 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 539 transitions. Word has length 154 [2021-05-06 02:34:28,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:28,790 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 539 transitions. [2021-05-06 02:34:28,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 6 states have call successors, (22) [2021-05-06 02:34:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 539 transitions. [2021-05-06 02:34:28,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 02:34:28,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:28,791 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-06 02:34:29,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:29,005 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:29,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:29,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 6 times [2021-05-06 02:34:29,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:29,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853107942] [2021-05-06 02:34:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:29,010 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:29,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553356552] [2021-05-06 02:34:29,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:29,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 02:34:29,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:34:29,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:34:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:29,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 28 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2021-05-06 02:34:29,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:29,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853107942] [2021-05-06 02:34:29,307 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:29,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553356552] [2021-05-06 02:34:29,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553356552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:29,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:29,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:34:29,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519704927] [2021-05-06 02:34:29,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:34:29,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:29,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:34:29,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:34:29,308 INFO L87 Difference]: Start difference. First operand 419 states and 539 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 02:34:29,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:29,535 INFO L93 Difference]: Finished difference Result 435 states and 552 transitions. [2021-05-06 02:34:29,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:34:29,536 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 157 [2021-05-06 02:34:29,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:29,538 INFO L225 Difference]: With dead ends: 435 [2021-05-06 02:34:29,538 INFO L226 Difference]: Without dead ends: 432 [2021-05-06 02:34:29,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:34:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-06 02:34:29,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 431. [2021-05-06 02:34:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 242 states have (on average 1.103305785123967) internal successors, (267), 243 states have internal predecessors, (267), 141 states have call successors, (141), 48 states have call predecessors, (141), 47 states have return successors, (139), 139 states have call predecessors, (139), 139 states have call successors, (139) [2021-05-06 02:34:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 547 transitions. [2021-05-06 02:34:29,582 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 547 transitions. Word has length 157 [2021-05-06 02:34:29,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:29,582 INFO L480 AbstractCegarLoop]: Abstraction has 431 states and 547 transitions. [2021-05-06 02:34:29,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 02:34:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 547 transitions. [2021-05-06 02:34:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 02:34:29,584 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:34:29,584 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-06 02:34:29,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 02:34:29,797 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:34:29,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:34:29,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 7 times [2021-05-06 02:34:29,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:34:29,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546107351] [2021-05-06 02:34:29,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:34:29,802 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:34:29,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884175677] [2021-05-06 02:34:29,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:34:29,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 89 conjunts are in the unsatisfiable core [2021-05-06 02:34:29,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:34:29,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:29,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,765 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-05-06 02:34:30,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:30,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,173 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-05-06 02:34:31,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:34:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 227 proven. 129 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2021-05-06 02:34:31,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:34:31,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546107351] [2021-05-06 02:34:31,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:34:31,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884175677] [2021-05-06 02:34:31,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884175677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:34:31,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:34:31,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 02:34:31,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098418137] [2021-05-06 02:34:31,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 02:34:31,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:34:31,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 02:34:31,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:34:31,376 INFO L87 Difference]: Start difference. First operand 431 states and 547 transitions. Second operand has 25 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 14 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2021-05-06 02:34:32,671 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-05-06 02:34:33,121 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-06 02:34:33,485 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-06 02:34:33,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:34:33,659 INFO L93 Difference]: Finished difference Result 488 states and 623 transitions. [2021-05-06 02:34:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 02:34:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 14 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) Word has length 160 [2021-05-06 02:34:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:34:33,660 INFO L225 Difference]: With dead ends: 488 [2021-05-06 02:34:33,660 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:34:33,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2192.7ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 02:34:33,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:34:33,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:34:33,662 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 02:34:33,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:34:33,662 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2021-05-06 02:34:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:34:33,662 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:34:33,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 14 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2021-05-06 02:34:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:34:33,662 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:34:33,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:34:33,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:34:34,066 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 186 [2021-05-06 02:34:34,301 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 264 [2021-05-06 02:34:34,434 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 186 [2021-05-06 02:34:34,632 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 264 [2021-05-06 02:34:34,855 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 260 [2021-05-06 02:34:38,441 WARN L205 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 167 DAG size of output: 46 [2021-05-06 02:34:43,055 WARN L205 SmtUtils]: Spent 4.58 s on a formula simplification. DAG size of input: 253 DAG size of output: 49 [2021-05-06 02:34:43,179 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2021-05-06 02:34:47,177 WARN L205 SmtUtils]: Spent 4.00 s on a formula simplification. DAG size of input: 167 DAG size of output: 46 [2021-05-06 02:34:47,292 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 31 [2021-05-06 02:34:54,669 WARN L205 SmtUtils]: Spent 7.38 s on a formula simplification. DAG size of input: 253 DAG size of output: 49 [2021-05-06 02:34:55,138 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 30 [2021-05-06 02:35:05,937 WARN L205 SmtUtils]: Spent 10.80 s on a formula simplification. DAG size of input: 251 DAG size of output: 45 [2021-05-06 02:35:06,409 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 39 [2021-05-06 02:35:06,434 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:35:06,434 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:35:06,434 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:35:06,434 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:35:06,434 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 02:35:06,434 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:35:06,434 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:35:06,435 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:35:06,435 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:35:06,435 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:35:06,435 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:35:06,435 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:35:06,435 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:35:06,435 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:35:06,435 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 5) (<= main_~y~0 5) (<= 0 main_~y~0)) [2021-05-06 02:35:06,435 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 74) no Hoare annotation was computed. [2021-05-06 02:35:06,435 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse1 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse2 (<= main_~x~0 5)) (.cse3 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse4 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse0 (<= main_~y~0 5)) (.cse5 (<= 1 main_~y~0))) (or (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse0 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse4 .cse5 (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse1 (<= 1 main_~x~0) .cse2 .cse3 (< main_~b~0 main_~a~0) .cse4 .cse0 .cse5))) [2021-05-06 02:35:06,435 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse5 (< main_~b~0 main_~a~0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse0 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 5)) (.cse1 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse2 (<= main_~x~0 5)) (.cse3 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse7 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse0 .cse2 (= main_~k~0 0) .cse4 .cse5 .cse6 .cse7 (= main_~c~0 main_~a~0)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse0 (= main_~a~0 main_~x~0) .cse4 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse7 (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-06 02:35:06,435 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (let ((.cse5 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~x~0 5)) (.cse6 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse3 (<= main_~y~0 5)) (.cse4 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (= main_~k~0 0) (< main_~b~0 main_~c~0) .cse2 .cse3 .cse4 (= main_~c~0 main_~a~0)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse3 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse5 .cse1 (= main_~b~0 main_~y~0) .cse6 .cse2 .cse4 (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse5 .cse0 .cse1 .cse6 (< main_~b~0 main_~a~0) .cse2 .cse3 .cse4))) [2021-05-06 02:35:06,435 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 74) no Hoare annotation was computed. [2021-05-06 02:35:06,435 INFO L198 CegarLoopUtils]: For program point L42(lines 42 43) no Hoare annotation was computed. [2021-05-06 02:35:06,436 INFO L194 CegarLoopUtils]: At program point L71(line 71) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~x~0 5) (<= main_~y~0 5) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (<= 0 main_~b~0)) [2021-05-06 02:35:06,436 INFO L194 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (<= main_~x~0 5) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~y~0 5) (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) [2021-05-06 02:35:06,436 INFO L194 CegarLoopUtils]: At program point L38-1(line 38) the Hoare annotation is: (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (<= main_~x~0 5) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= main_~y~0 5) (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)) [2021-05-06 02:35:06,436 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 74) the Hoare annotation is: true [2021-05-06 02:35:06,436 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:35:06,436 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= main_~x~0 5) (<= 0 main_~x~0)) [2021-05-06 02:35:06,436 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~x~0 5) (<= 0 main_~x~0) (<= main_~y~0 5) (<= 0 main_~y~0)) [2021-05-06 02:35:06,436 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:35:06,437 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:35:06,437 INFO L198 CegarLoopUtils]: For program point L51(lines 47 56) no Hoare annotation was computed. [2021-05-06 02:35:06,437 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse5 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~x~0 5)) (.cse6 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse3 (<= main_~y~0 5)) (.cse4 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (= main_~k~0 0) (< main_~b~0 main_~c~0) .cse2 .cse3 .cse4 (= main_~c~0 main_~a~0)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse3 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse5 .cse1 (= main_~b~0 main_~y~0) .cse6 .cse2 .cse4 (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)) (and .cse5 .cse0 .cse1 .cse6 (< main_~b~0 main_~a~0) .cse2 .cse3 .cse4))) [2021-05-06 02:35:06,437 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 56) the Hoare annotation is: (let ((.cse5 (< main_~b~0 main_~a~0)) (.cse6 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse0 (<= 1 main_~x~0)) (.cse4 (<= main_~y~0 5)) (.cse1 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0))) (.cse2 (<= main_~x~0 5)) (.cse3 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0)))) (.cse7 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7) (and .cse0 .cse2 (= main_~k~0 0) .cse4 .cse5 .cse6 .cse7 (= main_~c~0 main_~a~0)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) .cse0 (= main_~a~0 main_~x~0) .cse4 (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse1 .cse2 (= main_~b~0 main_~y~0) .cse3 .cse7 (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-06 02:35:06,437 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 56) no Hoare annotation was computed. [2021-05-06 02:35:06,437 INFO L194 CegarLoopUtils]: At program point L41-1(lines 39 68) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~x~0 5)) (.cse2 (<= main_~y~0 5))) (or (and .cse0 .cse1 .cse2 (< main_~b~0 main_~a~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse2 (<= 1 main_~b~0) (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-06 02:35:06,437 INFO L198 CegarLoopUtils]: For program point L72(line 72) no Hoare annotation was computed. [2021-05-06 02:35:06,437 INFO L194 CegarLoopUtils]: At program point L41-2(lines 41 68) the Hoare annotation is: (let ((.cse0 (<= main_~x~0 5)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= 1 main_~y~0))) (or (and (= main_~x~0 (+ main_~y~0 main_~b~0)) .cse0 (= main_~y~0 main_~x~0) .cse1 .cse2 (= main_~q~0 1) (= (+ main_~s~0 1) 0)) (and (<= 1 main_~x~0) .cse0 (<= main_~y~0 5) (< main_~b~0 main_~a~0) .cse1 .cse2 (<= 0 main_~b~0)))) [2021-05-06 02:35:06,437 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:35:06,437 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:35:06,437 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:35:06,437 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:35:06,437 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:35:06,437 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:35:06,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:35:06 BoogieIcfgContainer [2021-05-06 02:35:06,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:35:06,458 INFO L168 Benchmark]: Toolchain (without parser) took 69533.04 ms. Allocated memory was 205.5 MB in the beginning and 357.6 MB in the end (delta: 152.0 MB). Free memory was 168.6 MB in the beginning and 200.4 MB in the end (delta: -31.9 MB). Peak memory consumption was 199.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:06,458 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 205.5 MB. Free memory is still 185.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:35:06,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.93 ms. Allocated memory is still 205.5 MB. Free memory was 168.3 MB in the beginning and 186.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.2 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:06,458 INFO L168 Benchmark]: Boogie Preprocessor took 43.49 ms. Allocated memory is still 205.5 MB. Free memory was 186.7 MB in the beginning and 185.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:06,458 INFO L168 Benchmark]: RCFGBuilder took 315.22 ms. Allocated memory is still 205.5 MB. Free memory was 185.1 MB in the beginning and 167.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:06,458 INFO L168 Benchmark]: TraceAbstraction took 68988.80 ms. Allocated memory was 205.5 MB in the beginning and 357.6 MB in the end (delta: 152.0 MB). Free memory was 166.8 MB in the beginning and 200.4 MB in the end (delta: -33.6 MB). Peak memory consumption was 198.3 MB. Max. memory is 8.0 GB. [2021-05-06 02:35:06,458 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 205.5 MB. Free memory is still 185.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 181.93 ms. Allocated memory is still 205.5 MB. Free memory was 168.3 MB in the beginning and 186.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 10.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.49 ms. Allocated memory is still 205.5 MB. Free memory was 186.7 MB in the beginning and 185.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 315.22 ms. Allocated memory is still 205.5 MB. Free memory was 185.1 MB in the beginning and 167.3 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 68988.80 ms. Allocated memory was 205.5 MB in the beginning and 357.6 MB in the end (delta: 152.0 MB). Free memory was 166.8 MB in the beginning and 200.4 MB in the end (delta: -33.6 MB). Peak memory consumption was 198.3 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: 36345.7ms, OverallIterations: 31, TraceHistogramMax: 21, EmptinessCheckTime: 28.6ms, AutomataDifference: 16310.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 32570.1ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1433 SDtfs, 942 SDslu, 9097 SDs, 0 SdLazy, 11332 SolverSat, 1103 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10390.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3250 GetRequests, 2776 SyntacticMatches, 16 SemanticMatches, 458 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 8664.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=431occurred in iteration=30, InterpolantAutomatonStates: 372, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 620.6ms AutomataMinimizationTime, 31 MinimizatonAttempts, 182 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 20 LocationsWithAnnotation, 233 PreInvPairs, 429 NumberOfFragments, 945 HoareAnnotationTreeSize, 233 FomulaSimplifications, 452282 FormulaSimplificationTreeSizeReduction, 1128.1ms HoareSimplificationTime, 20 FomulaSimplificationsInter, 138966 FormulaSimplificationTreeSizeReductionInter, 31415.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 262.9ms SsaConstructionTime, 1058.0ms SatisfiabilityAnalysisTime, 10562.0ms InterpolantComputationTime, 3151 NumberOfCodeBlocks, 2791 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 3120 ConstructedInterpolants, 0 QuantifiedInterpolants, 20518 SizeOfPredicates, 246 NumberOfNonLiveVariables, 7933 ConjunctsInSsa, 1192 ConjunctsInUnsatCore, 31 InterpolantComputations, 2 PerfectInterpolantSequences, 10052/11280 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: 47]: Loop Invariant Derived loop invariant: ((((((((1 <= x && a == k * b + c) && x <= 5) && b == y * s + x * q) && y <= 5) && b < a) && a == y * r + x * p) && 1 <= y) || (((((((1 <= x && x <= 5) && k == 0) && y <= 5) && b < a) && a == y * r + x * p) && 1 <= y) && c == a)) || ((((((((((((y * y == yy && 1 <= x) && a == x) && y <= 5) && x * y == xy) && r == 0) && a == k * b + c) && x <= 5) && b == y) && b == y * s + x * q) && 1 <= y) && p == 1) && s == 1) - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: (((((1 <= x && x <= 5) && y <= 5) && b < a) && a == y * r + x * p) && 1 <= y) || (((((((((((y * y == yy && x * y == xy) && r == 0) && 1 <= x) && x <= 5) && b == y) && a == x) && b == y * s + x * q) && y <= 5) && 1 <= b) && p == 1) && s == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...