/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_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:29:27,881 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:29:27,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:29:27,937 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:29:27,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:29:27,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:29:27,967 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:29:27,968 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:29:27,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:29:27,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:29:27,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:29:27,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:29:27,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:29:27,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:29:27,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:29:27,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:29:27,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:29:27,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:29:28,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:29:28,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:29:28,004 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 02:29:28,040 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:29:28,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:29:28,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:29:28,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:29:28,044 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:29:28,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:29:28,044 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:29:28,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:29:28,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:29:28,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:29:28,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:29:28,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:29:28,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:29:28,046 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:29:28,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:29:28,046 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:29:28,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:29:28,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:29:28,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:29:28,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:29:28,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:29:28,047 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:29:28,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:29:28,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:29:28,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:29:28,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:29:28,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:29:28,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:29:28,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:29:28,366 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:29:28,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:29:28,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:29:28,400 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:29:28,401 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:29:28,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-05-06 02:29:28,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba66cda3/604d4cc05190413ba952a81df12a4b5f/FLAG1c32183b1 [2021-05-06 02:29:28,974 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:29:28,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-05-06 02:29:28,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba66cda3/604d4cc05190413ba952a81df12a4b5f/FLAG1c32183b1 [2021-05-06 02:29:29,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba66cda3/604d4cc05190413ba952a81df12a4b5f [2021-05-06 02:29:29,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:29:29,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:29:29,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:29:29,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:29:29,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:29:29,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:29:29" (1/1) ... [2021-05-06 02:29:29,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cecfec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29, skipping insertion in model container [2021-05-06 02:29:29,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:29:29" (1/1) ... [2021-05-06 02:29:29,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:29:29,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:29:29,514 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_unwindbound10.c[490,503] [2021-05-06 02:29:29,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:29:29,543 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:29:29,559 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_unwindbound10.c[490,503] [2021-05-06 02:29:29,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:29:29,596 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:29:29,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29 WrapperNode [2021-05-06 02:29:29,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:29:29,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:29:29,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:29:29,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:29:29,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29" (1/1) ... [2021-05-06 02:29:29,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29" (1/1) ... [2021-05-06 02:29:29,639 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29" (1/1) ... [2021-05-06 02:29:29,639 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29" (1/1) ... [2021-05-06 02:29:29,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29" (1/1) ... [2021-05-06 02:29:29,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29" (1/1) ... [2021-05-06 02:29:29,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29" (1/1) ... [2021-05-06 02:29:29,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:29:29,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:29:29,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:29:29,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:29:29,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29" (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 02:29:29,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:29:29,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:29:29,748 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:29:29,748 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:29:29,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:29:29,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:29:29,749 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:29:29,749 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:29:29,750 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:29:29,750 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:29:29,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:29:29,750 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:29:29,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:29:29,751 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:29:29,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:29:29,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:29:29,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:29:29,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:29:29,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:29:29,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:29:30,089 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:29:30,090 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:29:30,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:29:30 BoogieIcfgContainer [2021-05-06 02:29:30,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:29:30,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:29:30,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:29:30,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:29:30,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:29:29" (1/3) ... [2021-05-06 02:29:30,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461efd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:29:30, skipping insertion in model container [2021-05-06 02:29:30,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:29:29" (2/3) ... [2021-05-06 02:29:30,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461efd3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:29:30, skipping insertion in model container [2021-05-06 02:29:30,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:29:30" (3/3) ... [2021-05-06 02:29:30,098 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2021-05-06 02:29:30,103 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:29:30,106 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:29:30,122 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:29:30,142 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:29:30,142 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:29:30,142 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:29:30,142 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:29:30,143 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:29:30,143 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:29:30,143 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:29:30,143 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:29:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:29:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 02:29:30,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:30,163 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:30,163 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:30,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2021-05-06 02:29:30,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:30,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662943634] [2021-05-06 02:29:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:30,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:29:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:30,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:29:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:30,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:29:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:30,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:29:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:30,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:29:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:29:30,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:30,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662943634] [2021-05-06 02:29:30,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662943634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:29:30,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:29:30,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:29:30,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637082492] [2021-05-06 02:29:30,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:29:30,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:29:30,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:29:30,421 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:30,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:30,672 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-06 02:29:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:29:30,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-06 02:29:30,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:30,680 INFO L225 Difference]: With dead ends: 72 [2021-05-06 02:29:30,681 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:29:30,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:29:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:29:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 02:29:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:29:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-06 02:29:30,721 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-06 02:29:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:30,721 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-06 02:29:30,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-06 02:29:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:29:30,723 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:30,724 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:30,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:29:30,724 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2021-05-06 02:29:30,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:30,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882509814] [2021-05-06 02:29:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:30,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:30,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786066630] [2021-05-06 02:29:30,757 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 02:29:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:30,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:29:30,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:30,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:30,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:30,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:30,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:30,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:30,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:29:30,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:30,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882509814] [2021-05-06 02:29:30,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:30,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786066630] [2021-05-06 02:29:30,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786066630] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:29:30,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:29:30,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:29:30,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483167676] [2021-05-06 02:29:30,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:29:30,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:30,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:29:30,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:29:30,993 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:31,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:31,010 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-05-06 02:29:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:29:31,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:29:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:31,012 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:29:31,012 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 02:29:31,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:29:31,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 02:29:31,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 02:29:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:29:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-06 02:29:31,022 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-06 02:29:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:31,023 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-06 02:29:31,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-06 02:29:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:29:31,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:31,024 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:31,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:29:31,251 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:31,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2021-05-06 02:29:31,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:31,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643783082] [2021-05-06 02:29:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:31,268 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:31,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064025757] [2021-05-06 02:29:31,268 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 02:29:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:31,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:29:31,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:31,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:31,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:31,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:31,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:31,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:29:31,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:31,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643783082] [2021-05-06 02:29:31,450 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:31,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064025757] [2021-05-06 02:29:31,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064025757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:31,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:31,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:29:31,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050119311] [2021-05-06 02:29:31,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:29:31,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:31,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:29:31,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:29:31,452 INFO L87 Difference]: Start difference. First operand 36 states and 47 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:31,536 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-05-06 02:29:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:29:31,537 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 02:29:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:31,538 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:29:31,538 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 02:29:31,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 02:29:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-06 02:29:31,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:29:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 02:29:31,548 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-06 02:29:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:31,549 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 02:29:31,549 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 02:29:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:29:31,550 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:31,550 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:31,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:31,776 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:31,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:31,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2021-05-06 02:29:31,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:31,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410720897] [2021-05-06 02:29:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:31,792 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:31,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728148656] [2021-05-06 02:29:31,793 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 02:29:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:31,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:29:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:31,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:31,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:31,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:29:32,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:32,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410720897] [2021-05-06 02:29:32,133 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:32,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728148656] [2021-05-06 02:29:32,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728148656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:32,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:32,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:29:32,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198755138] [2021-05-06 02:29:32,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:29:32,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:29:32,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:32,136 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:32,325 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-05-06 02:29:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:29:32,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 02:29:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:32,330 INFO L225 Difference]: With dead ends: 59 [2021-05-06 02:29:32,330 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 02:29:32,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 02:29:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-06 02:29:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:29:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-06 02:29:32,363 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-06 02:29:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:32,363 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-06 02:29:32,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-06 02:29:32,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:29:32,366 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:32,367 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:32,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:32,585 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:32,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2021-05-06 02:29:32,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:32,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279631404] [2021-05-06 02:29:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:32,607 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:32,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892455143] [2021-05-06 02:29:32,608 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 02:29:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:32,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:29:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:32,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:29:32,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:32,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279631404] [2021-05-06 02:29:32,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:32,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892455143] [2021-05-06 02:29:32,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892455143] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:29:32,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:29:32,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:29:32,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816930801] [2021-05-06 02:29:32,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:29:32,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:29:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:29:32,803 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:32,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:32,862 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-06 02:29:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:29:32,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 02:29:32,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:32,868 INFO L225 Difference]: With dead ends: 63 [2021-05-06 02:29:32,869 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 02:29:32,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:29:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 02:29:32,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 02:29:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:29:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-06 02:29:32,884 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-06 02:29:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:32,885 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-06 02:29:32,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:29:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-06 02:29:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 02:29:32,890 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:32,890 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:33,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:33,105 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:33,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2021-05-06 02:29:33,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:33,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116155315] [2021-05-06 02:29:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:33,122 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:33,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623132690] [2021-05-06 02:29:33,122 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 02:29:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:29:33,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:33,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:29:33,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116155315] [2021-05-06 02:29:33,304 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:33,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623132690] [2021-05-06 02:29:33,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623132690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:33,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:33,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:33,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34180344] [2021-05-06 02:29:33,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:33,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:33,306 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:29:33,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:33,421 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-06 02:29:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:29:33,421 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 02:29:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:33,424 INFO L225 Difference]: With dead ends: 58 [2021-05-06 02:29:33,424 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 02:29:33,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:29:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 02:29:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 02:29:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:29:33,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-06 02:29:33,450 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-06 02:29:33,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:33,450 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-06 02:29:33,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:29:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-06 02:29:33,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 02:29:33,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:33,451 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:33,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:29:33,671 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2021-05-06 02:29:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:33,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006592738] [2021-05-06 02:29:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:33,715 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:33,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272165462] [2021-05-06 02:29:33,716 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 02:29:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:33,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:29:33,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:33,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:33,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:29:34,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:34,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006592738] [2021-05-06 02:29:34,190 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:34,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272165462] [2021-05-06 02:29:34,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272165462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:34,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:34,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:29:34,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701235047] [2021-05-06 02:29:34,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:29:34,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:34,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:29:34,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:34,193 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:29:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:34,402 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2021-05-06 02:29:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:29:34,403 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 02:29:34,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:34,404 INFO L225 Difference]: With dead ends: 62 [2021-05-06 02:29:34,404 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 02:29:34,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:29:34,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 02:29:34,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 02:29:34,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:29:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-06 02:29:34,434 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-06 02:29:34,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:34,436 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-06 02:29:34,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:29:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-06 02:29:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 02:29:34,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:34,437 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:34,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:34,657 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2021-05-06 02:29:34,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:34,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909497812] [2021-05-06 02:29:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:34,667 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:34,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821644470] [2021-05-06 02:29:34,667 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 02:29:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:34,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:29:34,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:34,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:34,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:35,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:35,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:35,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:35,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:35,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:35,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-06 02:29:35,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:35,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909497812] [2021-05-06 02:29:35,128 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:35,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821644470] [2021-05-06 02:29:35,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821644470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:35,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:35,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:29:35,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356225997] [2021-05-06 02:29:35,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:29:35,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:35,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:29:35,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:29:35,130 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:29:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:35,438 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-05-06 02:29:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:29:35,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 02:29:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:35,454 INFO L225 Difference]: With dead ends: 66 [2021-05-06 02:29:35,454 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:29:35,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:29:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 02:29:35,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:29:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-06 02:29:35,475 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-06 02:29:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:35,476 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-06 02:29:35,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:29:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-06 02:29:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 02:29:35,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:35,492 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:35,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:35,717 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:35,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:35,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2021-05-06 02:29:35,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:35,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23462069] [2021-05-06 02:29:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:35,736 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:35,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961033086] [2021-05-06 02:29:35,736 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 02:29:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:35,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:29:35,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:36,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:29:36,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:36,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23462069] [2021-05-06 02:29:36,076 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:36,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961033086] [2021-05-06 02:29:36,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961033086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:36,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:36,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:29:36,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549973595] [2021-05-06 02:29:36,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:29:36,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:36,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:29:36,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:29:36,078 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:29:36,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:36,230 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-05-06 02:29:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:29:36,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-06 02:29:36,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:36,233 INFO L225 Difference]: With dead ends: 96 [2021-05-06 02:29:36,233 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 02:29:36,234 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 02:29:36,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-06 02:29:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:29:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-06 02:29:36,269 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-06 02:29:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:36,269 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-06 02:29:36,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:29:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-06 02:29:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 02:29:36,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:36,271 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:36,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:29:36,485 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:36,485 INFO L82 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2021-05-06 02:29:36,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:36,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770604041] [2021-05-06 02:29:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:36,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:36,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236207360] [2021-05-06 02:29:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:36,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:29:36,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:36,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:29:36,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:36,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770604041] [2021-05-06 02:29:36,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:36,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236207360] [2021-05-06 02:29:36,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236207360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:36,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:36,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:29:36,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737132531] [2021-05-06 02:29:36,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:29:36,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:36,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:29:36,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:29:36,834 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:29:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:36,959 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2021-05-06 02:29:36,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:29:36,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-06 02:29:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:36,976 INFO L225 Difference]: With dead ends: 107 [2021-05-06 02:29:36,976 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 02:29:36,976 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:36,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 02:29:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 02:29:37,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:29:37,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 02:29:37,009 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-06 02:29:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:37,009 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 02:29:37,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:29:37,009 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 02:29:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:29:37,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:37,010 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:37,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:37,229 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2021-05-06 02:29:37,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:37,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157520219] [2021-05-06 02:29:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:37,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:37,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026764157] [2021-05-06 02:29:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:37,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:29:37,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:37,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:29:37,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:37,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157520219] [2021-05-06 02:29:37,616 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:37,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026764157] [2021-05-06 02:29:37,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026764157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:37,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:37,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:37,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463341502] [2021-05-06 02:29:37,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:37,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:37,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:37,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:37,619 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 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 02:29:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:37,937 INFO L93 Difference]: Finished difference Result 178 states and 253 transitions. [2021-05-06 02:29:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:29:37,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 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 61 [2021-05-06 02:29:37,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:37,940 INFO L225 Difference]: With dead ends: 178 [2021-05-06 02:29:37,940 INFO L226 Difference]: Without dead ends: 170 [2021-05-06 02:29:37,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:29:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-06 02:29:37,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-06 02:29:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 02:29:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-06 02:29:37,997 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-06 02:29:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:37,998 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-06 02:29:37,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 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 02:29:37,998 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-06 02:29:37,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 02:29:37,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:37,999 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:38,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:38,221 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:38,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:38,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2021-05-06 02:29:38,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:38,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533156161] [2021-05-06 02:29:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:38,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:38,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [654046240] [2021-05-06 02:29:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:38,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:29:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:38,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:29:38,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:38,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533156161] [2021-05-06 02:29:38,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:38,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654046240] [2021-05-06 02:29:38,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654046240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:38,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:38,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:29:38,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407700237] [2021-05-06 02:29:38,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:29:38,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:38,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:29:38,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:29:38,590 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:29:38,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:38,716 INFO L93 Difference]: Finished difference Result 175 states and 244 transitions. [2021-05-06 02:29:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:29:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-06 02:29:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:38,721 INFO L225 Difference]: With dead ends: 175 [2021-05-06 02:29:38,721 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 02:29:38,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 02:29:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-06 02:29:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 02:29:38,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-06 02:29:38,763 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-06 02:29:38,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:38,763 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-06 02:29:38,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:29:38,764 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-06 02:29:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:29:38,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:38,764 INFO L523 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:38,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:29:38,985 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:38,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:38,985 INFO L82 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2021-05-06 02:29:38,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:38,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780752592] [2021-05-06 02:29:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:38,993 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:38,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179596957] [2021-05-06 02:29:38,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:29:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:29:39,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:39,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:29:39,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:39,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780752592] [2021-05-06 02:29:39,378 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:39,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179596957] [2021-05-06 02:29:39,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179596957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:39,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:39,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:29:39,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071682182] [2021-05-06 02:29:39,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:29:39,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:39,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:29:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:39,380 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:29:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:39,522 INFO L93 Difference]: Finished difference Result 245 states and 345 transitions. [2021-05-06 02:29:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:29:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 02:29:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:39,525 INFO L225 Difference]: With dead ends: 245 [2021-05-06 02:29:39,525 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 02:29:39,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 02:29:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-06 02:29:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:29:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-06 02:29:39,555 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-06 02:29:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:39,555 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-06 02:29:39,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:29:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-06 02:29:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 02:29:39,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:39,556 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:39,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:29:39,771 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:39,771 INFO L82 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2021-05-06 02:29:39,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:39,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560497437] [2021-05-06 02:29:39,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:39,778 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:39,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332137303] [2021-05-06 02:29:39,779 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 02:29:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:39,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:29:39,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:40,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:29:40,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560497437] [2021-05-06 02:29:40,134 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:40,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332137303] [2021-05-06 02:29:40,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332137303] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:40,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:40,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:40,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613694671] [2021-05-06 02:29:40,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:40,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:40,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:40,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:40,135 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:29:40,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:40,397 INFO L93 Difference]: Finished difference Result 214 states and 296 transitions. [2021-05-06 02:29:40,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:29:40,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2021-05-06 02:29:40,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:40,399 INFO L225 Difference]: With dead ends: 214 [2021-05-06 02:29:40,399 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 02:29:40,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:29:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 02:29:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-05-06 02:29:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.2857142857142858) internal successors, (162), 132 states have internal predecessors, (162), 65 states have call successors, (65), 17 states have call predecessors, (65), 16 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:29:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 289 transitions. [2021-05-06 02:29:40,442 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 289 transitions. Word has length 68 [2021-05-06 02:29:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:40,442 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 289 transitions. [2021-05-06 02:29:40,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:29:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 289 transitions. [2021-05-06 02:29:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 02:29:40,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:40,456 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2021-05-06 02:29:40,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:29:40,677 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:40,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:40,677 INFO L82 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2021-05-06 02:29:40,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:40,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555861297] [2021-05-06 02:29:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:40,684 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:40,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085347881] [2021-05-06 02:29:40,685 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 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 02:29:40,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:29:40,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:40,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 02:29:41,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:41,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555861297] [2021-05-06 02:29:41,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:41,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085347881] [2021-05-06 02:29:41,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085347881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:41,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:41,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:29:41,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891147037] [2021-05-06 02:29:41,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:29:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:41,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:29:41,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:29:41,265 INFO L87 Difference]: Start difference. First operand 208 states and 289 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:29:41,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:41,700 INFO L93 Difference]: Finished difference Result 216 states and 296 transitions. [2021-05-06 02:29:41,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:29:41,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-06 02:29:41,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:41,702 INFO L225 Difference]: With dead ends: 216 [2021-05-06 02:29:41,702 INFO L226 Difference]: Without dead ends: 214 [2021-05-06 02:29:41,704 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:29:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-06 02:29:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2021-05-06 02:29:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 129 states have (on average 1.2790697674418605) internal successors, (165), 135 states have internal predecessors, (165), 65 states have call successors, (65), 18 states have call predecessors, (65), 17 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:29:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 292 transitions. [2021-05-06 02:29:41,743 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 292 transitions. Word has length 73 [2021-05-06 02:29:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:41,744 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 292 transitions. [2021-05-06 02:29:41,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:29:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 292 transitions. [2021-05-06 02:29:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 02:29:41,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:41,746 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:41,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:41,963 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2021-05-06 02:29:41,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:41,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4079814] [2021-05-06 02:29:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:41,971 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:41,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983001036] [2021-05-06 02:29:41,971 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 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 02:29:42,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:29:42,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:42,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 02:29:42,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:42,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:42,845 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 02:29:42,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:42,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4079814] [2021-05-06 02:29:42,846 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:42,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983001036] [2021-05-06 02:29:42,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983001036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:42,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:42,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:29:42,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040019321] [2021-05-06 02:29:42,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:29:42,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:42,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:29:42,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:29:42,848 INFO L87 Difference]: Start difference. First operand 212 states and 292 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:29:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:43,476 INFO L93 Difference]: Finished difference Result 224 states and 302 transitions. [2021-05-06 02:29:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:29:43,493 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-06 02:29:43,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:43,495 INFO L225 Difference]: With dead ends: 224 [2021-05-06 02:29:43,495 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 02:29:43,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:29:43,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 02:29:43,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2021-05-06 02:29:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 135 states have (on average 1.2666666666666666) internal successors, (171), 141 states have internal predecessors, (171), 65 states have call successors, (65), 20 states have call predecessors, (65), 19 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:29:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2021-05-06 02:29:43,536 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 78 [2021-05-06 02:29:43,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:43,537 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2021-05-06 02:29:43,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:29:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2021-05-06 02:29:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 02:29:43,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:43,539 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 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] [2021-05-06 02:29:43,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:29:43,757 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:43,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:43,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 2 times [2021-05-06 02:29:43,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:43,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104593324] [2021-05-06 02:29:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:43,772 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:43,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941401205] [2021-05-06 02:29:43,772 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 02:29:43,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:43,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:43,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:29:43,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:43,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:43,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:43,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:43,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:43,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:43,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 02:29:44,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:44,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104593324] [2021-05-06 02:29:44,040 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:44,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941401205] [2021-05-06 02:29:44,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941401205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:44,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:44,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:29:44,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869823222] [2021-05-06 02:29:44,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:29:44,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:29:44,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:29:44,043 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:44,257 INFO L93 Difference]: Finished difference Result 285 states and 407 transitions. [2021-05-06 02:29:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:29:44,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-05-06 02:29:44,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:44,259 INFO L225 Difference]: With dead ends: 285 [2021-05-06 02:29:44,259 INFO L226 Difference]: Without dead ends: 283 [2021-05-06 02:29:44,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:29:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-06 02:29:44,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 253. [2021-05-06 02:29:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 150 states have (on average 1.2933333333333332) internal successors, (194), 157 states have internal predecessors, (194), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 02:29:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 355 transitions. [2021-05-06 02:29:44,304 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 355 transitions. Word has length 82 [2021-05-06 02:29:44,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:44,305 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 355 transitions. [2021-05-06 02:29:44,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:44,305 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 355 transitions. [2021-05-06 02:29:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 02:29:44,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:44,306 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:44,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:44,507 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:44,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:44,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2021-05-06 02:29:44,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:44,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003471956] [2021-05-06 02:29:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:44,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:44,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080085062] [2021-05-06 02:29:44,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:29:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:44,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:29:44,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:44,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:29:44,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:44,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003471956] [2021-05-06 02:29:44,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:44,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080085062] [2021-05-06 02:29:44,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080085062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:44,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:44,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:29:44,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145935443] [2021-05-06 02:29:44,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:29:44,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:44,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:29:44,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:44,754 INFO L87 Difference]: Start difference. First operand 253 states and 355 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:44,847 INFO L93 Difference]: Finished difference Result 263 states and 365 transitions. [2021-05-06 02:29:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:29:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-06 02:29:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:44,849 INFO L225 Difference]: With dead ends: 263 [2021-05-06 02:29:44,849 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 02:29:44,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 02:29:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-05-06 02:29:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 160 states have internal predecessors, (197), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 02:29:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 358 transitions. [2021-05-06 02:29:44,871 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 358 transitions. Word has length 83 [2021-05-06 02:29:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:44,872 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 358 transitions. [2021-05-06 02:29:44,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 358 transitions. [2021-05-06 02:29:44,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 02:29:44,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:44,873 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:45,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:29:45,093 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2021-05-06 02:29:45,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:45,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975787725] [2021-05-06 02:29:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:45,100 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:45,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264801785] [2021-05-06 02:29:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:45,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 02:29:45,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:45,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 02:29:45,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975787725] [2021-05-06 02:29:45,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264801785] [2021-05-06 02:29:45,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264801785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:45,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:45,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:29:45,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474915768] [2021-05-06 02:29:45,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:29:45,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:45,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:29:45,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:45,383 INFO L87 Difference]: Start difference. First operand 256 states and 358 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:45,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:45,656 INFO L93 Difference]: Finished difference Result 289 states and 411 transitions. [2021-05-06 02:29:45,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:29:45,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2021-05-06 02:29:45,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:45,658 INFO L225 Difference]: With dead ends: 289 [2021-05-06 02:29:45,659 INFO L226 Difference]: Without dead ends: 286 [2021-05-06 02:29:45,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-06 02:29:45,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-06 02:29:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 168 states have (on average 1.3035714285714286) internal successors, (219), 176 states have internal predecessors, (219), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-06 02:29:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 406 transitions. [2021-05-06 02:29:45,687 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 406 transitions. Word has length 84 [2021-05-06 02:29:45,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:45,688 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 406 transitions. [2021-05-06 02:29:45,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 406 transitions. [2021-05-06 02:29:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:29:45,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:45,690 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:45,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 02:29:45,917 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:45,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 2 times [2021-05-06 02:29:45,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:45,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169842530] [2021-05-06 02:29:45,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:45,936 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:45,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640451920] [2021-05-06 02:29:45,937 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 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 02:29:46,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:46,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:46,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:29:46,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:46,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:29:46,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:46,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169842530] [2021-05-06 02:29:46,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:46,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640451920] [2021-05-06 02:29:46,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640451920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:46,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:46,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:46,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647151426] [2021-05-06 02:29:46,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:46,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:46,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:46,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:46,180 INFO L87 Difference]: Start difference. First operand 285 states and 406 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:46,312 INFO L93 Difference]: Finished difference Result 333 states and 453 transitions. [2021-05-06 02:29:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:29:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-06 02:29:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:46,314 INFO L225 Difference]: With dead ends: 333 [2021-05-06 02:29:46,314 INFO L226 Difference]: Without dead ends: 324 [2021-05-06 02:29:46,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:29:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-06 02:29:46,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-05-06 02:29:46,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 196 states have (on average 1.2653061224489797) internal successors, (248), 203 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 02:29:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2021-05-06 02:29:46,341 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 87 [2021-05-06 02:29:46,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:46,341 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2021-05-06 02:29:46,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2021-05-06 02:29:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 02:29:46,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:46,342 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:46,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:29:46,565 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:46,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:46,565 INFO L82 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2021-05-06 02:29:46,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:46,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870612949] [2021-05-06 02:29:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:46,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:46,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010713840] [2021-05-06 02:29:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:29:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:46,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:29:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:46,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:29:46,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:46,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870612949] [2021-05-06 02:29:46,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:46,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010713840] [2021-05-06 02:29:46,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010713840] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:46,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:46,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:46,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99114886] [2021-05-06 02:29:46,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:46,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:46,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:46,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:46,819 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:46,983 INFO L93 Difference]: Finished difference Result 452 states and 648 transitions. [2021-05-06 02:29:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:29:46,984 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-06 02:29:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:46,986 INFO L225 Difference]: With dead ends: 452 [2021-05-06 02:29:46,986 INFO L226 Difference]: Without dead ends: 325 [2021-05-06 02:29:46,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:29:46,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-06 02:29:47,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-05-06 02:29:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 205 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 02:29:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 441 transitions. [2021-05-06 02:29:47,013 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 441 transitions. Word has length 89 [2021-05-06 02:29:47,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:47,014 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 441 transitions. [2021-05-06 02:29:47,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:29:47,014 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 441 transitions. [2021-05-06 02:29:47,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 02:29:47,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:47,015 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:47,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:29:47,229 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash 325787368, now seen corresponding path program 2 times [2021-05-06 02:29:47,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:47,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392605675] [2021-05-06 02:29:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:47,237 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:47,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863570206] [2021-05-06 02:29:47,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:47,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:47,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:29:47,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:47,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-06 02:29:47,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392605675] [2021-05-06 02:29:47,468 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863570206] [2021-05-06 02:29:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863570206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:29:47,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:29:47,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:29:47,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507971928] [2021-05-06 02:29:47,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:29:47,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:47,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:29:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:29:47,469 INFO L87 Difference]: Start difference. First operand 325 states and 441 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:29:47,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:47,559 INFO L93 Difference]: Finished difference Result 524 states and 770 transitions. [2021-05-06 02:29:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:29:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-06 02:29:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:47,562 INFO L225 Difference]: With dead ends: 524 [2021-05-06 02:29:47,563 INFO L226 Difference]: Without dead ends: 427 [2021-05-06 02:29:47,564 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-06 02:29:47,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 361. [2021-05-06 02:29:47,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 222 states have (on average 1.2657657657657657) internal successors, (281), 229 states have internal predecessors, (281), 110 states have call successors, (110), 29 states have call predecessors, (110), 28 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:29:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2021-05-06 02:29:47,597 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 93 [2021-05-06 02:29:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:47,597 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2021-05-06 02:29:47,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:29:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2021-05-06 02:29:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 02:29:47,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:47,600 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 02:29:47,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:29:47,818 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:47,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2021-05-06 02:29:47,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:47,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477464035] [2021-05-06 02:29:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:47,826 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:47,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157188591] [2021-05-06 02:29:47,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:29:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:47,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 02:29:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:48,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-06 02:29:48,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477464035] [2021-05-06 02:29:48,440 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:48,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157188591] [2021-05-06 02:29:48,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157188591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:48,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:48,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:29:48,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022788721] [2021-05-06 02:29:48,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:29:48,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:48,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:29:48,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:48,441 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:49,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:49,038 INFO L93 Difference]: Finished difference Result 369 states and 505 transitions. [2021-05-06 02:29:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:29:49,038 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 02:29:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:49,041 INFO L225 Difference]: With dead ends: 369 [2021-05-06 02:29:49,041 INFO L226 Difference]: Without dead ends: 367 [2021-05-06 02:29:49,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:29:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-06 02:29:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-05-06 02:29:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 225 states have (on average 1.2622222222222221) internal successors, (284), 232 states have internal predecessors, (284), 110 states have call successors, (110), 30 states have call predecessors, (110), 29 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:29:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 501 transitions. [2021-05-06 02:29:49,075 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 501 transitions. Word has length 101 [2021-05-06 02:29:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:49,075 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 501 transitions. [2021-05-06 02:29:49,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 501 transitions. [2021-05-06 02:29:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 02:29:49,078 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:49,078 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 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] [2021-05-06 02:29:49,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:49,305 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:49,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 3 times [2021-05-06 02:29:49,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:49,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232690609] [2021-05-06 02:29:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:49,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:49,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697745861] [2021-05-06 02:29:49,312 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 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 02:29:49,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:29:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:29:49,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:49,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 02:29:49,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:49,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232690609] [2021-05-06 02:29:49,574 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:49,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697745861] [2021-05-06 02:29:49,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697745861] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:49,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:49,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:29:49,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807867347] [2021-05-06 02:29:49,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:29:49,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:49,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:29:49,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:49,575 INFO L87 Difference]: Start difference. First operand 365 states and 501 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:29:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:49,672 INFO L93 Difference]: Finished difference Result 371 states and 506 transitions. [2021-05-06 02:29:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:29:49,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2021-05-06 02:29:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:49,675 INFO L225 Difference]: With dead ends: 371 [2021-05-06 02:29:49,675 INFO L226 Difference]: Without dead ends: 369 [2021-05-06 02:29:49,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-06 02:29:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-05-06 02:29:49,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 235 states have internal predecessors, (287), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:29:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 504 transitions. [2021-05-06 02:29:49,708 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 504 transitions. Word has length 105 [2021-05-06 02:29:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:49,709 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 504 transitions. [2021-05-06 02:29:49,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:29:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 504 transitions. [2021-05-06 02:29:49,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 02:29:49,710 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:49,710 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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] [2021-05-06 02:29:49,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-06 02:29:49,933 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 2 times [2021-05-06 02:29:49,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:49,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339198841] [2021-05-06 02:29:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:49,939 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:49,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050565967] [2021-05-06 02:29:49,939 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 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 02:29:50,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:50,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:50,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:29:50,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:50,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-05-06 02:29:50,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:50,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339198841] [2021-05-06 02:29:50,351 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:50,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050565967] [2021-05-06 02:29:50,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050565967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:50,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:50,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:29:50,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515458880] [2021-05-06 02:29:50,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:29:50,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:29:50,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:50,355 INFO L87 Difference]: Start difference. First operand 369 states and 504 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:29:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:50,968 INFO L93 Difference]: Finished difference Result 403 states and 557 transitions. [2021-05-06 02:29:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:29:50,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2021-05-06 02:29:50,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:50,971 INFO L225 Difference]: With dead ends: 403 [2021-05-06 02:29:50,972 INFO L226 Difference]: Without dead ends: 400 [2021-05-06 02:29:50,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:29:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-06 02:29:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-05-06 02:29:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 251 states have internal predecessors, (308), 123 states have call successors, (123), 32 states have call predecessors, (123), 31 states have return successors, (120), 114 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-06 02:29:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2021-05-06 02:29:51,006 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 107 [2021-05-06 02:29:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:51,006 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2021-05-06 02:29:51,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:29:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2021-05-06 02:29:51,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 02:29:51,007 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:51,008 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 02:29:51,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:51,221 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 2 times [2021-05-06 02:29:51,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:51,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195942369] [2021-05-06 02:29:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:51,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:51,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053639301] [2021-05-06 02:29:51,230 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 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 02:29:51,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:51,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:51,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:29:51,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:51,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:29:51,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:51,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195942369] [2021-05-06 02:29:51,517 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:51,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053639301] [2021-05-06 02:29:51,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053639301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:51,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:51,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:29:51,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291627260] [2021-05-06 02:29:51,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:29:51,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:51,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:29:51,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:51,522 INFO L87 Difference]: Start difference. First operand 398 states and 551 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:29:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:51,695 INFO L93 Difference]: Finished difference Result 459 states and 609 transitions. [2021-05-06 02:29:51,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:29:51,695 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2021-05-06 02:29:51,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:51,698 INFO L225 Difference]: With dead ends: 459 [2021-05-06 02:29:51,698 INFO L226 Difference]: Without dead ends: 450 [2021-05-06 02:29:51,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:51,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-06 02:29:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 449. [2021-05-06 02:29:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 280 states have (on average 1.2357142857142858) internal successors, (346), 288 states have internal predecessors, (346), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (124), 118 states have call predecessors, (124), 124 states have call successors, (124) [2021-05-06 02:29:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 597 transitions. [2021-05-06 02:29:51,758 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 597 transitions. Word has length 110 [2021-05-06 02:29:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:51,758 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 597 transitions. [2021-05-06 02:29:51,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:29:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 597 transitions. [2021-05-06 02:29:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 02:29:51,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:51,760 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 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] [2021-05-06 02:29:51,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 02:29:51,977 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 3 times [2021-05-06 02:29:51,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:51,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703807852] [2021-05-06 02:29:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:51,987 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:51,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1334271137] [2021-05-06 02:29:51,987 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 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 02:29:52,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:29:52,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:52,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:29:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:52,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-06 02:29:52,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:52,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703807852] [2021-05-06 02:29:52,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:52,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334271137] [2021-05-06 02:29:52,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334271137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:52,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:52,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:29:52,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147838284] [2021-05-06 02:29:52,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:29:52,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:52,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:29:52,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:29:52,259 INFO L87 Difference]: Start difference. First operand 449 states and 597 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:29:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:52,574 INFO L93 Difference]: Finished difference Result 633 states and 901 transitions. [2021-05-06 02:29:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:29:52,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2021-05-06 02:29:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:52,577 INFO L225 Difference]: With dead ends: 633 [2021-05-06 02:29:52,578 INFO L226 Difference]: Without dead ends: 625 [2021-05-06 02:29:52,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:29:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-05-06 02:29:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 488. [2021-05-06 02:29:52,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 307 states have (on average 1.250814332247557) internal successors, (384), 315 states have internal predecessors, (384), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 02:29:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 659 transitions. [2021-05-06 02:29:52,621 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 659 transitions. Word has length 111 [2021-05-06 02:29:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:52,621 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 659 transitions. [2021-05-06 02:29:52,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:29:52,621 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 659 transitions. [2021-05-06 02:29:52,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 02:29:52,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:52,622 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 02:29:52,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 02:29:52,845 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:52,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:52,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 2 times [2021-05-06 02:29:52,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:52,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892978501] [2021-05-06 02:29:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:52,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:52,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801320472] [2021-05-06 02:29:52,851 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 02:29:52,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:52,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:52,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:29:52,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:52,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:29:53,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:53,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892978501] [2021-05-06 02:29:53,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:53,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801320472] [2021-05-06 02:29:53,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801320472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:53,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:53,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:29:53,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058106040] [2021-05-06 02:29:53,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:29:53,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:29:53,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:29:53,119 INFO L87 Difference]: Start difference. First operand 488 states and 659 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:29:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:53,326 INFO L93 Difference]: Finished difference Result 681 states and 962 transitions. [2021-05-06 02:29:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:29:53,326 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2021-05-06 02:29:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:53,329 INFO L225 Difference]: With dead ends: 681 [2021-05-06 02:29:53,329 INFO L226 Difference]: Without dead ends: 490 [2021-05-06 02:29:53,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-06 02:29:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2021-05-06 02:29:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 309 states have (on average 1.2394822006472492) internal successors, (383), 317 states have internal predecessors, (383), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 02:29:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 658 transitions. [2021-05-06 02:29:53,370 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 658 transitions. Word has length 112 [2021-05-06 02:29:53,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:53,370 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 658 transitions. [2021-05-06 02:29:53,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:29:53,370 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 658 transitions. [2021-05-06 02:29:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 02:29:53,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:53,371 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:53,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 02:29:53,588 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:53,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 3 times [2021-05-06 02:29:53,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:53,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332051128] [2021-05-06 02:29:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:53,594 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:53,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854373656] [2021-05-06 02:29:53,594 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 02:29:53,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:29:53,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:53,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:29:53,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:53,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:29:53,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:53,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332051128] [2021-05-06 02:29:53,902 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:53,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854373656] [2021-05-06 02:29:53,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854373656] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:53,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:53,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:29:53,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714774431] [2021-05-06 02:29:53,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:29:53,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:29:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:29:53,904 INFO L87 Difference]: Start difference. First operand 490 states and 658 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:29:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:54,120 INFO L93 Difference]: Finished difference Result 761 states and 1039 transitions. [2021-05-06 02:29:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:29:54,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2021-05-06 02:29:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:54,123 INFO L225 Difference]: With dead ends: 761 [2021-05-06 02:29:54,124 INFO L226 Difference]: Without dead ends: 570 [2021-05-06 02:29:54,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:29:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-06 02:29:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2021-05-06 02:29:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 360 states have (on average 1.211111111111111) internal successors, (436), 368 states have internal predecessors, (436), 147 states have call successors, (147), 55 states have call predecessors, (147), 54 states have return successors, (143), 138 states have call predecessors, (143), 143 states have call successors, (143) [2021-05-06 02:29:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 726 transitions. [2021-05-06 02:29:54,167 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 726 transitions. Word has length 116 [2021-05-06 02:29:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:54,167 INFO L480 AbstractCegarLoop]: Abstraction has 562 states and 726 transitions. [2021-05-06 02:29:54,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:29:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 726 transitions. [2021-05-06 02:29:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 02:29:54,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:54,169 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:54,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 02:29:54,396 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:54,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 2 times [2021-05-06 02:29:54,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:54,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31767122] [2021-05-06 02:29:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:54,402 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:54,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945788792] [2021-05-06 02:29:54,403 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 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 02:29:54,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:29:54,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:54,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:54,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:54,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-05-06 02:29:54,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:54,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31767122] [2021-05-06 02:29:54,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:54,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945788792] [2021-05-06 02:29:54,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945788792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:54,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:54,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:54,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018596947] [2021-05-06 02:29:54,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:54,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:54,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:54,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:54,693 INFO L87 Difference]: Start difference. First operand 562 states and 726 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:29:54,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:54,969 INFO L93 Difference]: Finished difference Result 593 states and 768 transitions. [2021-05-06 02:29:54,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:29:54,969 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 118 [2021-05-06 02:29:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:54,972 INFO L225 Difference]: With dead ends: 593 [2021-05-06 02:29:54,973 INFO L226 Difference]: Without dead ends: 590 [2021-05-06 02:29:54,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:29:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-05-06 02:29:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 586. [2021-05-06 02:29:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 379 states have (on average 1.2189973614775726) internal successors, (462), 389 states have internal predecessors, (462), 151 states have call successors, (151), 56 states have call predecessors, (151), 55 states have return successors, (147), 140 states have call predecessors, (147), 147 states have call successors, (147) [2021-05-06 02:29:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2021-05-06 02:29:55,025 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 118 [2021-05-06 02:29:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:55,026 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2021-05-06 02:29:55,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:29:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2021-05-06 02:29:55,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 02:29:55,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:55,027 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 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] [2021-05-06 02:29:55,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 02:29:55,247 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:55,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:55,248 INFO L82 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 3 times [2021-05-06 02:29:55,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:55,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330967103] [2021-05-06 02:29:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:55,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:55,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163221712] [2021-05-06 02:29:55,254 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 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 02:29:55,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:29:55,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:55,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 02:29:55,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:55,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:55,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,526 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-06 02:29:56,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:56,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:57,024 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-06 02:29:57,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:57,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:57,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 117 proven. 38 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-06 02:29:57,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:57,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330967103] [2021-05-06 02:29:57,171 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:57,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163221712] [2021-05-06 02:29:57,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163221712] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:57,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:57,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:29:57,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915959896] [2021-05-06 02:29:57,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:29:57,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:57,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:29:57,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:29:57,173 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:58,030 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-06 02:29:58,608 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-06 02:29:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:58,901 INFO L93 Difference]: Finished difference Result 616 states and 796 transitions. [2021-05-06 02:29:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:29:58,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 124 [2021-05-06 02:29:58,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:58,905 INFO L225 Difference]: With dead ends: 616 [2021-05-06 02:29:58,905 INFO L226 Difference]: Without dead ends: 612 [2021-05-06 02:29:58,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1801.3ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:29:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-05-06 02:29:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 587. [2021-05-06 02:29:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 383 states have (on average 1.2114882506527416) internal successors, (464), 392 states have internal predecessors, (464), 147 states have call successors, (147), 58 states have call predecessors, (147), 56 states have return successors, (143), 136 states have call predecessors, (143), 143 states have call successors, (143) [2021-05-06 02:29:58,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 754 transitions. [2021-05-06 02:29:58,957 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 754 transitions. Word has length 124 [2021-05-06 02:29:58,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:58,957 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 754 transitions. [2021-05-06 02:29:58,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 754 transitions. [2021-05-06 02:29:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 02:29:58,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:58,959 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-06 02:29:59,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:59,167 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:59,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:59,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 4 times [2021-05-06 02:29:59,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:59,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154705443] [2021-05-06 02:29:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:59,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:59,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877377226] [2021-05-06 02:29:59,191 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:59,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:29:59,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:59,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-06 02:29:59,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:59,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:59,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:59,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:59,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:59,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:59,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:00,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:00,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:00,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:00,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:00,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:00,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:00,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 106 proven. 112 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-06 02:30:00,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:00,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154705443] [2021-05-06 02:30:00,135 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:00,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877377226] [2021-05-06 02:30:00,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877377226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:00,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:00,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:30:00,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443932137] [2021-05-06 02:30:00,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:30:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:30:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:30:00,136 INFO L87 Difference]: Start difference. First operand 587 states and 754 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-06 02:30:00,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:00,792 INFO L93 Difference]: Finished difference Result 637 states and 817 transitions. [2021-05-06 02:30:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:30:00,792 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 123 [2021-05-06 02:30:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:00,795 INFO L225 Difference]: With dead ends: 637 [2021-05-06 02:30:00,795 INFO L226 Difference]: Without dead ends: 635 [2021-05-06 02:30:00,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 394.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:30:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-05-06 02:30:00,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 629. [2021-05-06 02:30:00,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 407 states have (on average 1.2113022113022114) internal successors, (493), 417 states have internal predecessors, (493), 160 states have call successors, (160), 63 states have call predecessors, (160), 61 states have return successors, (156), 148 states have call predecessors, (156), 156 states have call successors, (156) [2021-05-06 02:30:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 809 transitions. [2021-05-06 02:30:00,848 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 809 transitions. Word has length 123 [2021-05-06 02:30:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:00,848 INFO L480 AbstractCegarLoop]: Abstraction has 629 states and 809 transitions. [2021-05-06 02:30:00,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 10 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-06 02:30:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 809 transitions. [2021-05-06 02:30:00,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 02:30:00,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:00,850 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:01,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 02:30:01,075 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:01,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:01,076 INFO L82 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 5 times [2021-05-06 02:30:01,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:01,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524737357] [2021-05-06 02:30:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:01,083 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:01,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398491946] [2021-05-06 02:30:01,083 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:01,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:30:01,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:30:01,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-06 02:30:01,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:01,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 91 proven. 138 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-05-06 02:30:01,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:01,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524737357] [2021-05-06 02:30:01,700 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:01,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398491946] [2021-05-06 02:30:01,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398491946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:01,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:01,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:30:01,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333686120] [2021-05-06 02:30:01,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:30:01,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:01,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:30:01,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:30:01,701 INFO L87 Difference]: Start difference. First operand 629 states and 809 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 02:30:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:02,409 INFO L93 Difference]: Finished difference Result 645 states and 823 transitions. [2021-05-06 02:30:02,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:30:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2021-05-06 02:30:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:02,414 INFO L225 Difference]: With dead ends: 645 [2021-05-06 02:30:02,414 INFO L226 Difference]: Without dead ends: 643 [2021-05-06 02:30:02,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:30:02,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-05-06 02:30:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 637. [2021-05-06 02:30:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 413 states have (on average 1.208232445520581) internal successors, (499), 423 states have internal predecessors, (499), 160 states have call successors, (160), 65 states have call predecessors, (160), 63 states have return successors, (156), 148 states have call predecessors, (156), 156 states have call successors, (156) [2021-05-06 02:30:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 815 transitions. [2021-05-06 02:30:02,471 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 815 transitions. Word has length 128 [2021-05-06 02:30:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:02,471 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 815 transitions. [2021-05-06 02:30:02,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 02:30:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 815 transitions. [2021-05-06 02:30:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 02:30:02,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:02,473 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:02,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 02:30:02,689 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 4 times [2021-05-06 02:30:02,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:02,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006159590] [2021-05-06 02:30:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:02,696 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:02,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674419847] [2021-05-06 02:30:02,696 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:02,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:30:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:30:02,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 02:30:02,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:02,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:02,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,355 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-05-06 02:30:03,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,739 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-05-06 02:30:03,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:03,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:04,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:04,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:04,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 92 proven. 111 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-06 02:30:04,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:04,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006159590] [2021-05-06 02:30:04,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:04,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674419847] [2021-05-06 02:30:04,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674419847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:04,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:04,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:30:04,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418739644] [2021-05-06 02:30:04,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 02:30:04,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:04,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 02:30:04,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:30:04,495 INFO L87 Difference]: Start difference. First operand 637 states and 815 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2021-05-06 02:30:05,310 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-05-06 02:30:05,890 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2021-05-06 02:30:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:06,493 INFO L93 Difference]: Finished difference Result 673 states and 867 transitions. [2021-05-06 02:30:06,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:30:06,494 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) Word has length 130 [2021-05-06 02:30:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:06,497 INFO L225 Difference]: With dead ends: 673 [2021-05-06 02:30:06,497 INFO L226 Difference]: Without dead ends: 668 [2021-05-06 02:30:06,498 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1913.2ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:30:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-05-06 02:30:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 641. [2021-05-06 02:30:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 414 states have (on average 1.2053140096618358) internal successors, (499), 425 states have internal predecessors, (499), 162 states have call successors, (162), 65 states have call predecessors, (162), 64 states have return successors, (159), 150 states have call predecessors, (159), 159 states have call successors, (159) [2021-05-06 02:30:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 820 transitions. [2021-05-06 02:30:06,555 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 820 transitions. Word has length 130 [2021-05-06 02:30:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:06,555 INFO L480 AbstractCegarLoop]: Abstraction has 641 states and 820 transitions. [2021-05-06 02:30:06,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2021-05-06 02:30:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 820 transitions. [2021-05-06 02:30:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-06 02:30:06,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:06,557 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:06,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:06,773 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:06,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 3 times [2021-05-06 02:30:06,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:06,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243956530] [2021-05-06 02:30:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:06,779 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:06,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2134379110] [2021-05-06 02:30:06,779 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:07,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:30:07,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:30:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:30:07,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:07,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 02:30:07,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:07,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243956530] [2021-05-06 02:30:07,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:07,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134379110] [2021-05-06 02:30:07,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134379110] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:07,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:07,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:30:07,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997232063] [2021-05-06 02:30:07,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:30:07,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:07,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:30:07,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:30:07,365 INFO L87 Difference]: Start difference. First operand 641 states and 820 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:30:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:07,610 INFO L93 Difference]: Finished difference Result 657 states and 838 transitions. [2021-05-06 02:30:07,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:30:07,610 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2021-05-06 02:30:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:07,613 INFO L225 Difference]: With dead ends: 657 [2021-05-06 02:30:07,613 INFO L226 Difference]: Without dead ends: 650 [2021-05-06 02:30:07,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:30:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-05-06 02:30:07,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2021-05-06 02:30:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 423 states have (on average 1.2009456264775413) internal successors, (508), 434 states have internal predecessors, (508), 162 states have call successors, (162), 65 states have call predecessors, (162), 64 states have return successors, (159), 150 states have call predecessors, (159), 159 states have call successors, (159) [2021-05-06 02:30:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 829 transitions. [2021-05-06 02:30:07,666 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 829 transitions. Word has length 133 [2021-05-06 02:30:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:07,667 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 829 transitions. [2021-05-06 02:30:07,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:30:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 829 transitions. [2021-05-06 02:30:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 02:30:07,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:07,668 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:07,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-06 02:30:07,876 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:07,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 5 times [2021-05-06 02:30:07,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:07,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27362939] [2021-05-06 02:30:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:07,891 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:07,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938514578] [2021-05-06 02:30:07,892 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:08,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:30:08,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:30:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 02:30:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:08,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-05-06 02:30:08,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27362939] [2021-05-06 02:30:08,894 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938514578] [2021-05-06 02:30:08,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938514578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:08,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:08,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:30:08,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172592590] [2021-05-06 02:30:08,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:30:08,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:30:08,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:30:08,896 INFO L87 Difference]: Start difference. First operand 650 states and 829 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:30:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:09,744 INFO L93 Difference]: Finished difference Result 697 states and 893 transitions. [2021-05-06 02:30:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:30:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 134 [2021-05-06 02:30:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:09,748 INFO L225 Difference]: With dead ends: 697 [2021-05-06 02:30:09,748 INFO L226 Difference]: Without dead ends: 694 [2021-05-06 02:30:09,749 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:30:09,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-05-06 02:30:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 687. [2021-05-06 02:30:09,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 444 states have (on average 1.204954954954955) internal successors, (535), 456 states have internal predecessors, (535), 175 states have call successors, (175), 68 states have call predecessors, (175), 67 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2021-05-06 02:30:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 882 transitions. [2021-05-06 02:30:09,813 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 882 transitions. Word has length 134 [2021-05-06 02:30:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:09,814 INFO L480 AbstractCegarLoop]: Abstraction has 687 states and 882 transitions. [2021-05-06 02:30:09,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:30:09,814 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 882 transitions. [2021-05-06 02:30:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-06 02:30:09,815 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:09,815 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 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] [2021-05-06 02:30:10,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:10,023 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:10,023 INFO L82 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 4 times [2021-05-06 02:30:10,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:10,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993913671] [2021-05-06 02:30:10,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:10,028 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:10,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593548267] [2021-05-06 02:30:10,029 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:10,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:30:10,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:30:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:30:10,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:10,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 02:30:10,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993913671] [2021-05-06 02:30:10,369 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:10,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593548267] [2021-05-06 02:30:10,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593548267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:10,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:10,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:30:10,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372391194] [2021-05-06 02:30:10,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:30:10,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:30:10,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:30:10,374 INFO L87 Difference]: Start difference. First operand 687 states and 882 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:30:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:10,669 INFO L93 Difference]: Finished difference Result 1018 states and 1343 transitions. [2021-05-06 02:30:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:30:10,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2021-05-06 02:30:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:10,675 INFO L225 Difference]: With dead ends: 1018 [2021-05-06 02:30:10,675 INFO L226 Difference]: Without dead ends: 801 [2021-05-06 02:30:10,676 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:30:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2021-05-06 02:30:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 791. [2021-05-06 02:30:10,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 515 states have (on average 1.1825242718446602) internal successors, (609), 525 states have internal predecessors, (609), 192 states have call successors, (192), 85 states have call predecessors, (192), 83 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2021-05-06 02:30:10,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 989 transitions. [2021-05-06 02:30:10,740 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 989 transitions. Word has length 139 [2021-05-06 02:30:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:10,740 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 989 transitions. [2021-05-06 02:30:10,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:30:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 989 transitions. [2021-05-06 02:30:10,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 02:30:10,742 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:10,742 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:10,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 02:30:10,968 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:10,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:10,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 6 times [2021-05-06 02:30:10,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:10,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208477311] [2021-05-06 02:30:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:10,973 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:10,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035343992] [2021-05-06 02:30:10,973 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:11,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:30:11,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:30:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 02:30:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:11,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-05-06 02:30:11,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:11,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208477311] [2021-05-06 02:30:11,888 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:11,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035343992] [2021-05-06 02:30:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035343992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:11,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:30:11,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821188778] [2021-05-06 02:30:11,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:30:11,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:11,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:30:11,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:30:11,890 INFO L87 Difference]: Start difference. First operand 791 states and 989 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:30:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:13,031 INFO L93 Difference]: Finished difference Result 913 states and 1170 transitions. [2021-05-06 02:30:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:30:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 146 [2021-05-06 02:30:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:13,036 INFO L225 Difference]: With dead ends: 913 [2021-05-06 02:30:13,036 INFO L226 Difference]: Without dead ends: 911 [2021-05-06 02:30:13,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:30:13,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-05-06 02:30:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 895. [2021-05-06 02:30:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 575 states have (on average 1.2052173913043478) internal successors, (693), 588 states have internal predecessors, (693), 231 states have call successors, (231), 90 states have call predecessors, (231), 88 states have return successors, (227), 216 states have call predecessors, (227), 227 states have call successors, (227) [2021-05-06 02:30:13,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1151 transitions. [2021-05-06 02:30:13,121 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1151 transitions. Word has length 146 [2021-05-06 02:30:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:13,121 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1151 transitions. [2021-05-06 02:30:13,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:30:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1151 transitions. [2021-05-06 02:30:13,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 02:30:13,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:13,123 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:13,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 02:30:13,331 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:13,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:13,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 7 times [2021-05-06 02:30:13,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:13,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12972437] [2021-05-06 02:30:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:13,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:13,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1791603413] [2021-05-06 02:30:13,338 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:13,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 111 conjunts are in the unsatisfiable core [2021-05-06 02:30:13,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:13,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,956 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-06 02:30:15,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 240 proven. 147 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-06 02:30:15,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12972437] [2021-05-06 02:30:15,420 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791603413] [2021-05-06 02:30:15,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791603413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:15,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:15,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 02:30:15,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053107931] [2021-05-06 02:30:15,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 02:30:15,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:15,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 02:30:15,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:30:15,422 INFO L87 Difference]: Start difference. First operand 895 states and 1151 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) [2021-05-06 02:30:18,428 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-06 02:30:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:18,900 INFO L93 Difference]: Finished difference Result 957 states and 1223 transitions. [2021-05-06 02:30:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 02:30:18,901 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) Word has length 151 [2021-05-06 02:30:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:18,904 INFO L225 Difference]: With dead ends: 957 [2021-05-06 02:30:18,904 INFO L226 Difference]: Without dead ends: 955 [2021-05-06 02:30:18,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2183.9ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 02:30:18,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-05-06 02:30:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 949. [2021-05-06 02:30:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 608 states have (on average 1.2023026315789473) internal successors, (731), 622 states have internal predecessors, (731), 244 states have call successors, (244), 98 states have call predecessors, (244), 96 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:30:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1215 transitions. [2021-05-06 02:30:18,993 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1215 transitions. Word has length 151 [2021-05-06 02:30:18,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:18,993 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1215 transitions. [2021-05-06 02:30:18,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) [2021-05-06 02:30:18,994 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1215 transitions. [2021-05-06 02:30:18,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 02:30:18,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:18,995 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:19,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 02:30:19,202 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:19,203 INFO L82 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 8 times [2021-05-06 02:30:19,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:19,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912491841] [2021-05-06 02:30:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:19,208 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:19,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690439451] [2021-05-06 02:30:19,208 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:19,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:30:19,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:30:19,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 02:30:19,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:19,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-05-06 02:30:19,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:19,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912491841] [2021-05-06 02:30:19,763 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:19,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690439451] [2021-05-06 02:30:19,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690439451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:19,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:19,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:30:19,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184644730] [2021-05-06 02:30:19,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:30:19,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:19,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:30:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:30:19,765 INFO L87 Difference]: Start difference. First operand 949 states and 1215 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 02:30:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:20,612 INFO L93 Difference]: Finished difference Result 961 states and 1226 transitions. [2021-05-06 02:30:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:30:20,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 151 [2021-05-06 02:30:20,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:20,617 INFO L225 Difference]: With dead ends: 961 [2021-05-06 02:30:20,617 INFO L226 Difference]: Without dead ends: 959 [2021-05-06 02:30:20,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:30:20,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-05-06 02:30:20,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 953. [2021-05-06 02:30:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 611 states have (on average 1.2013093289689034) internal successors, (734), 625 states have internal predecessors, (734), 244 states have call successors, (244), 99 states have call predecessors, (244), 97 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:30:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1218 transitions. [2021-05-06 02:30:20,701 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1218 transitions. Word has length 151 [2021-05-06 02:30:20,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:20,702 INFO L480 AbstractCegarLoop]: Abstraction has 953 states and 1218 transitions. [2021-05-06 02:30:20,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 02:30:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1218 transitions. [2021-05-06 02:30:20,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-06 02:30:20,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:20,704 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:20,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:20,924 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 6 times [2021-05-06 02:30:20,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:20,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129633136] [2021-05-06 02:30:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:20,929 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:20,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263396178] [2021-05-06 02:30:20,929 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:21,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 02:30:21,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:30:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 02:30:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:21,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 87 proven. 29 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2021-05-06 02:30:21,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:21,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129633136] [2021-05-06 02:30:21,264 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:21,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263396178] [2021-05-06 02:30:21,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263396178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:21,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:21,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:30:21,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561370163] [2021-05-06 02:30:21,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:30:21,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:21,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:30:21,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:30:21,265 INFO L87 Difference]: Start difference. First operand 953 states and 1218 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 02:30:21,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:21,503 INFO L93 Difference]: Finished difference Result 981 states and 1242 transitions. [2021-05-06 02:30:21,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:30:21,503 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 153 [2021-05-06 02:30:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:21,507 INFO L225 Difference]: With dead ends: 981 [2021-05-06 02:30:21,508 INFO L226 Difference]: Without dead ends: 975 [2021-05-06 02:30:21,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:30:21,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-05-06 02:30:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 966. [2021-05-06 02:30:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 621 states have (on average 1.1932367149758454) internal successors, (741), 635 states have internal predecessors, (741), 243 states have call successors, (243), 102 states have call predecessors, (243), 101 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:30:21,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1224 transitions. [2021-05-06 02:30:21,618 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1224 transitions. Word has length 153 [2021-05-06 02:30:21,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:21,618 INFO L480 AbstractCegarLoop]: Abstraction has 966 states and 1224 transitions. [2021-05-06 02:30:21,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 02:30:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1224 transitions. [2021-05-06 02:30:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 02:30:21,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:21,621 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:21,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:21,823 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:21,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:21,823 INFO L82 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 4 times [2021-05-06 02:30:21,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:21,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053123691] [2021-05-06 02:30:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:21,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:21,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606965112] [2021-05-06 02:30:21,828 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:21,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:30:21,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:30:21,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:30:21,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:21,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:21,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 02:30:22,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:22,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053123691] [2021-05-06 02:30:22,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:22,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606965112] [2021-05-06 02:30:22,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606965112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:22,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:22,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:30:22,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687015517] [2021-05-06 02:30:22,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:30:22,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:22,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:30:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:30:22,173 INFO L87 Difference]: Start difference. First operand 966 states and 1224 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 02:30:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:22,435 INFO L93 Difference]: Finished difference Result 985 states and 1246 transitions. [2021-05-06 02:30:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:30:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2021-05-06 02:30:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:22,440 INFO L225 Difference]: With dead ends: 985 [2021-05-06 02:30:22,440 INFO L226 Difference]: Without dead ends: 978 [2021-05-06 02:30:22,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:30:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-05-06 02:30:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 978. [2021-05-06 02:30:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 633 states have (on average 1.1895734597156398) internal successors, (753), 647 states have internal predecessors, (753), 243 states have call successors, (243), 102 states have call predecessors, (243), 101 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:30:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1236 transitions. [2021-05-06 02:30:22,563 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1236 transitions. Word has length 156 [2021-05-06 02:30:22,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:22,563 INFO L480 AbstractCegarLoop]: Abstraction has 978 states and 1236 transitions. [2021-05-06 02:30:22,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 02:30:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1236 transitions. [2021-05-06 02:30:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 02:30:22,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:22,565 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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] [2021-05-06 02:30:22,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-06 02:30:22,771 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:22,771 INFO L82 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 7 times [2021-05-06 02:30:22,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:22,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452228637] [2021-05-06 02:30:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:22,780 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:22,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589347342] [2021-05-06 02:30:22,781 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 90 conjunts are in the unsatisfiable core [2021-05-06 02:30:22,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:23,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:23,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:23,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:23,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:23,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:23,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:23,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:23,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 194 proven. 151 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2021-05-06 02:30:24,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:24,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452228637] [2021-05-06 02:30:24,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:24,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589347342] [2021-05-06 02:30:24,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589347342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:24,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:24,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:30:24,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019829590] [2021-05-06 02:30:24,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:30:24,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:30:24,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:30:24,002 INFO L87 Difference]: Start difference. First operand 978 states and 1236 transitions. Second operand has 18 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:30:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:25,453 INFO L93 Difference]: Finished difference Result 1011 states and 1289 transitions. [2021-05-06 02:30:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:30:25,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 157 [2021-05-06 02:30:25,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:25,455 INFO L225 Difference]: With dead ends: 1011 [2021-05-06 02:30:25,455 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:30:25,457 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1082.6ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:30:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:30:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:30:25,458 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 02:30:25,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:30:25,458 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 157 [2021-05-06 02:30:25,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:25,458 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:30:25,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:30:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:30:25,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:30:25,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:25,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:30:26,005 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 170 [2021-05-06 02:30:26,366 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 212 [2021-05-06 02:30:26,637 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 165 [2021-05-06 02:30:26,976 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 205 [2021-05-06 02:30:27,334 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 203 [2021-05-06 02:30:30,270 WARN L205 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 159 DAG size of output: 33 [2021-05-06 02:30:32,395 WARN L205 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 212 DAG size of output: 35 [2021-05-06 02:30:32,824 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2021-05-06 02:30:33,957 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 154 DAG size of output: 33 [2021-05-06 02:30:34,324 WARN L205 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-05-06 02:30:37,102 WARN L205 SmtUtils]: Spent 2.76 s on a formula simplification. DAG size of input: 205 DAG size of output: 35 [2021-05-06 02:30:38,866 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 204 DAG size of output: 32 [2021-05-06 02:30:38,910 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:30:38,910 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:30:38,910 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:30:38,910 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:30:38,910 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)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:30:38,911 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:30:38,911 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:30:38,911 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-06 02:30:38,911 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:30:38,911 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:30:38,911 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:30:38,911 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:30:38,911 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:30:38,912 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:30:38,912 INFO L198 CegarLoopUtils]: For program point L25(line 25) no Hoare annotation was computed. [2021-05-06 02:30:38,912 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 73) no Hoare annotation was computed. [2021-05-06 02:30:38,912 INFO L198 CegarLoopUtils]: For program point L50(lines 46 55) no Hoare annotation was computed. [2021-05-06 02:30:38,913 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= 1 main_~y~0))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) .cse0 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse1 .cse2) (and .cse0 (= main_~k~0 0) .cse1 .cse2 (= main_~c~0 main_~a~0)))) [2021-05-06 02:30:38,913 INFO L198 CegarLoopUtils]: For program point L46-1(lines 46 55) no Hoare annotation was computed. [2021-05-06 02:30:38,913 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 73) no Hoare annotation was computed. [2021-05-06 02:30:38,913 INFO L194 CegarLoopUtils]: At program point L46-3(lines 46 55) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1) (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~k~0 0) (= main_~c~0 main_~a~0) .cse1))) [2021-05-06 02:30:38,913 INFO L198 CegarLoopUtils]: For program point L46-4(lines 46 55) no Hoare annotation was computed. [2021-05-06 02:30:38,913 INFO L198 CegarLoopUtils]: For program point L40(lines 40 67) no Hoare annotation was computed. [2021-05-06 02:30:38,913 INFO L198 CegarLoopUtils]: For program point L71(line 71) no Hoare annotation was computed. [2021-05-06 02:30:38,913 INFO L194 CegarLoopUtils]: At program point L40-2(lines 38 67) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-06 02:30:38,913 INFO L194 CegarLoopUtils]: At program point L40-3(lines 40 67) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-06 02:30:38,914 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 19 73) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:30:38,914 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:30:38,914 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (= ~counter~0 |old(~counter~0)|))) [2021-05-06 02:30:38,914 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) (<= 1 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0))) [2021-05-06 02:30:38,914 INFO L194 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1) (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~k~0 0) (= main_~c~0 main_~a~0) .cse1))) [2021-05-06 02:30:38,914 INFO L194 CegarLoopUtils]: At program point L47-1(line 47) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) .cse0 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1) (and .cse0 (= main_~k~0 0) .cse1 (= main_~c~0 main_~a~0)))) [2021-05-06 02:30:38,914 INFO L198 CegarLoopUtils]: For program point L41(lines 41 42) no Hoare annotation was computed. [2021-05-06 02:30:38,914 INFO L194 CegarLoopUtils]: At program point L70(line 70) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-06 02:30:38,914 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (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_~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))) (<= 1 main_~b~0) (= ~counter~0 |old(~counter~0)|) (= main_~p~0 1) (= main_~s~0 1))) [2021-05-06 02:30:38,914 INFO L194 CegarLoopUtils]: At program point L37-1(line 37) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (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_~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_~xy~0 2147483647) (<= 1 main_~b~0) (= ~counter~0 |old(~counter~0)|) (= main_~p~0 1) (= main_~s~0 1))) [2021-05-06 02:30:38,914 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:30:38,914 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:30:38,914 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:30:38,914 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:30:38,914 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:30:38,915 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:30:38,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:30:38 BoogieIcfgContainer [2021-05-06 02:30:38,927 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:30:38,928 INFO L168 Benchmark]: Toolchain (without parser) took 69581.44 ms. Allocated memory was 192.9 MB in the beginning and 483.4 MB in the end (delta: 290.5 MB). Free memory was 156.4 MB in the beginning and 253.4 MB in the end (delta: -97.0 MB). Peak memory consumption was 275.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:30:38,928 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 192.9 MB. Free memory is still 173.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:30:38,928 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.68 ms. Allocated memory is still 192.9 MB. Free memory was 156.3 MB in the beginning and 171.7 MB in the end (delta: -15.4 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. [2021-05-06 02:30:38,928 INFO L168 Benchmark]: Boogie Preprocessor took 73.63 ms. Allocated memory is still 192.9 MB. Free memory was 171.7 MB in the beginning and 175.6 MB in the end (delta: -3.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:30:38,928 INFO L168 Benchmark]: RCFGBuilder took 418.84 ms. Allocated memory is still 192.9 MB. Free memory was 175.2 MB in the beginning and 158.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:30:38,929 INFO L168 Benchmark]: TraceAbstraction took 68835.20 ms. Allocated memory was 192.9 MB in the beginning and 483.4 MB in the end (delta: 290.5 MB). Free memory was 157.7 MB in the beginning and 253.4 MB in the end (delta: -95.7 MB). Peak memory consumption was 275.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:30:38,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 192.9 MB. Free memory is still 173.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.68 ms. Allocated memory is still 192.9 MB. Free memory was 156.3 MB in the beginning and 171.7 MB in the end (delta: -15.4 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 73.63 ms. Allocated memory is still 192.9 MB. Free memory was 171.7 MB in the beginning and 175.6 MB in the end (delta: -3.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 418.84 ms. Allocated memory is still 192.9 MB. Free memory was 175.2 MB in the beginning and 158.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 68835.20 ms. Allocated memory was 192.9 MB in the beginning and 483.4 MB in the end (delta: 290.5 MB). Free memory was 157.7 MB in the beginning and 253.4 MB in the end (delta: -95.7 MB). Peak memory consumption was 275.9 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, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 55521.3ms, OverallIterations: 43, TraceHistogramMax: 21, EmptinessCheckTime: 74.3ms, AutomataDifference: 21055.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 13248.4ms, InitialAbstractionConstructionTime: 10.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2317 SDtfs, 1715 SDslu, 11482 SDs, 0 SdLazy, 10499 SolverSat, 1426 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12797.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4179 GetRequests, 3645 SyntacticMatches, 16 SemanticMatches, 518 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 11685.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=978occurred in iteration=42, InterpolantAutomatonStates: 479, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1844.6ms AutomataMinimizationTime, 43 MinimizatonAttempts, 442 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 640 PreInvPairs, 1013 NumberOfFragments, 451 HoareAnnotationTreeSize, 640 FomulaSimplifications, 344765 FormulaSimplificationTreeSizeReduction, 2045.0ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 19320 FormulaSimplificationTreeSizeReductionInter, 11160.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 592.0ms SsaConstructionTime, 3401.9ms SatisfiabilityAnalysisTime, 17091.5ms InterpolantComputationTime, 4062 NumberOfCodeBlocks, 3715 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 4019 ConstructedInterpolants, 0 QuantifiedInterpolants, 23582 SizeOfPredicates, 286 NumberOfNonLiveVariables, 11988 ConjunctsInSsa, 1264 ConjunctsInUnsatCore, 43 InterpolantComputations, 4 PerfectInterpolantSequences, 9876/13557 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: 46]: Loop Invariant Derived loop invariant: (((((1 <= x && a == k * b + c) && b == y * s + x * q) && a == y * r + x * p) && 1 <= y) || !(\old(counter) <= 0)) || (((1 <= x && k == 0) && c == a) && 1 <= y) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || (1 <= x && 1 <= y) RESULT: Ultimate proved your program to be correct! Received shutdown request...