/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/egcd-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:47:08,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:47:08,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:47:08,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:47:08,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:47:08,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:47:08,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:47:08,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:47:08,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:47:08,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:47:08,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:47:08,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:47:08,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:47:08,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:47:08,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:47:08,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:47:08,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:47:08,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:47:08,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:47:08,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:47:08,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:47:09,013 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:47:09,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:47:09,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:47:09,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:47:09,015 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:47:09,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:47:09,015 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:47:09,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:47:09,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:47:09,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:47:09,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:47:09,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:47:09,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:47:09,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:47:09,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:47:09,017 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:47:09,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:47:09,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:47:09,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:47:09,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:47:09,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:47:09,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:47:09,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:47:09,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:47:09,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:47:09,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:47:09,018 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:47:09,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:47:09,018 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:47:09,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:47:09,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:47:09,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:47:09,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:47:09,269 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:47:09,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2021-05-02 14:47:09,305 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ba2c5dde/63c8793ce07b4d55b5934c673c16bef4/FLAG1b5d7b4cf [2021-05-02 14:47:09,638 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:47:09,639 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound10.c [2021-05-02 14:47:09,644 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ba2c5dde/63c8793ce07b4d55b5934c673c16bef4/FLAG1b5d7b4cf [2021-05-02 14:47:10,068 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ba2c5dde/63c8793ce07b4d55b5934c673c16bef4 [2021-05-02 14:47:10,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:47:10,072 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:47:10,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:47:10,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:47:10,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:47:10,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:47:10" (1/1) ... [2021-05-02 14:47:10,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40eb5db9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10, skipping insertion in model container [2021-05-02 14:47:10,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:47:10" (1/1) ... [2021-05-02 14:47:10,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:47:10,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:47:10,169 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/egcd-ll_valuebound10.c[489,502] [2021-05-02 14:47:10,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:47:10,185 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:47:10,192 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/egcd-ll_valuebound10.c[489,502] [2021-05-02 14:47:10,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:47:10,209 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:47:10,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10 WrapperNode [2021-05-02 14:47:10,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:47:10,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:47:10,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:47:10,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:47:10,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10" (1/1) ... [2021-05-02 14:47:10,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10" (1/1) ... [2021-05-02 14:47:10,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10" (1/1) ... [2021-05-02 14:47:10,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10" (1/1) ... [2021-05-02 14:47:10,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10" (1/1) ... [2021-05-02 14:47:10,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10" (1/1) ... [2021-05-02 14:47:10,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10" (1/1) ... [2021-05-02 14:47:10,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:47:10,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:47:10,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:47:10,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:47:10,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:47:10,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:47:10,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:47:10,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:47:10,325 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:47:10,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:47:10,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:47:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:47:10,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:47:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:47:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:47:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:47:10,326 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:47:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:47:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:47:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:47:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:47:10,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:47:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:47:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:47:10,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:47:10,495 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:47:10,495 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:47:10,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:47:10 BoogieIcfgContainer [2021-05-02 14:47:10,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:47:10,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:47:10,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:47:10,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:47:10,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:47:10" (1/3) ... [2021-05-02 14:47:10,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68086b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:47:10, skipping insertion in model container [2021-05-02 14:47:10,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:47:10" (2/3) ... [2021-05-02 14:47:10,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68086b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:47:10, skipping insertion in model container [2021-05-02 14:47:10,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:47:10" (3/3) ... [2021-05-02 14:47:10,513 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound10.c [2021-05-02 14:47:10,516 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:47:10,519 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:47:10,545 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:47:10,561 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:47:10,561 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:47:10,561 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:47:10,561 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:47:10,561 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:47:10,561 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:47:10,561 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:47:10,561 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:47:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 14:47:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:47:10,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:10,585 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] [2021-05-02 14:47:10,586 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:10,589 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-02 14:47:10,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:10,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066601082] [2021-05-02 14:47:10,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:10,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:47:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:47:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:10,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:47:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:10,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:47:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:10,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:47:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:47:10,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:10,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066601082] [2021-05-02 14:47:10,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066601082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:47:10,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:47:10,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:47:10,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216796873] [2021-05-02 14:47:10,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:47:10,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:10,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:47:10,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:47:10,837 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:47:10,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:10,973 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-02 14:47:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:47:10,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 14:47:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:10,979 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:47:10,979 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:47:10,981 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:47:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:47:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:47:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:47:11,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 14:47:11,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 14:47:11,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:11,009 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 14:47:11,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:47:11,009 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 14:47:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:47:11,010 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:11,010 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] [2021-05-02 14:47:11,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:47:11,010 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:11,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:11,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-02 14:47:11,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:11,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536710811] [2021-05-02 14:47:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:11,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:11,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846639075] [2021-05-02 14:47:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:11,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:47:11,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:11,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:47:11,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:11,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536710811] [2021-05-02 14:47:11,246 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:11,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846639075] [2021-05-02 14:47:11,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846639075] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:11,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:11,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:47:11,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955158581] [2021-05-02 14:47:11,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:47:11,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:47:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:47:11,248 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:47:11,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:11,347 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-02 14:47:11,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:47:11,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 14:47:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:11,349 INFO L225 Difference]: With dead ends: 48 [2021-05-02 14:47:11,349 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:47:11,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:47:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:47:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 14:47:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 14:47:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 14:47:11,361 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 14:47:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:11,361 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 14:47:11,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 14:47:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 14:47:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 14:47:11,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:11,362 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] [2021-05-02 14:47:11,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:47:11,568 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:11,568 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-02 14:47:11,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:11,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929371039] [2021-05-02 14:47:11,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:11,581 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:11,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140509860] [2021-05-02 14:47:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:11,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:47:11,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:11,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:47:11,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:11,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929371039] [2021-05-02 14:47:11,797 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:11,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140509860] [2021-05-02 14:47:11,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140509860] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:11,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:11,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:47:11,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059450662] [2021-05-02 14:47:11,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:47:11,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:11,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:47:11,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:47:11,800 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 14:47:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:11,915 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-02 14:47:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:47:11,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 14:47:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:11,919 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:47:11,920 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:47:11,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:47:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 14:47:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:47:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 14:47:11,954 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 14:47:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:11,954 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 14:47:11,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 14:47:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 14:47:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:47:11,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:11,957 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] [2021-05-02 14:47:12,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:12,177 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-02 14:47:12,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:12,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341683819] [2021-05-02 14:47:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:12,186 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:12,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090752085] [2021-05-02 14:47:12,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:12,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:47:12,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:12,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:47:12,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:12,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341683819] [2021-05-02 14:47:12,359 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:12,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090752085] [2021-05-02 14:47:12,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090752085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:12,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:12,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:47:12,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061587590] [2021-05-02 14:47:12,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:47:12,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:47:12,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:47:12,361 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:47:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:12,495 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-02 14:47:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:47:12,495 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), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-02 14:47:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:12,497 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:47:12,498 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:47:12,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:47:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:47:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 14:47:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:47:12,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 14:47:12,520 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 14:47:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:12,521 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 14:47:12,521 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), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:47:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 14:47:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 14:47:12,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:12,523 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] [2021-05-02 14:47:12,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:12,725 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:12,725 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-02 14:47:12,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:12,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432389152] [2021-05-02 14:47:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:12,734 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:12,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596532217] [2021-05-02 14:47:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:12,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:47:12,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:47:12,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:12,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432389152] [2021-05-02 14:47:12,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:12,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596532217] [2021-05-02 14:47:12,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596532217] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:47:12,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:47:12,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:47:12,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34412850] [2021-05-02 14:47:12,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:47:12,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:12,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:47:12,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:47:12,849 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:47:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:12,882 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-02 14:47:12,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:47:12,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 14:47:12,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:12,885 INFO L225 Difference]: With dead ends: 70 [2021-05-02 14:47:12,885 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 14:47:12,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:47:12,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 14:47:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 14:47:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:47:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 14:47:12,897 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 14:47:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:12,898 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 14:47:12,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 14:47:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 14:47:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 14:47:12,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:12,899 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:13,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:13,113 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:13,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-02 14:47:13,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:13,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87790890] [2021-05-02 14:47:13,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:13,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:13,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590630905] [2021-05-02 14:47:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:13,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:47:13,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:13,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 14:47:13,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:13,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87790890] [2021-05-02 14:47:13,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:13,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590630905] [2021-05-02 14:47:13,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590630905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:13,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:13,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:47:13,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238090839] [2021-05-02 14:47:13,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:47:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:13,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:47:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:47:13,281 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:47:13,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:13,351 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-05-02 14:47:13,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:47:13,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 14:47:13,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:13,353 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:47:13,353 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:47:13,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:47:13,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:47:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 14:47:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:47:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 14:47:13,373 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 14:47:13,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:13,374 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 14:47:13,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 14:47:13,374 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 14:47:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 14:47:13,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:13,375 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:13,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:47:13,589 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-02 14:47:13,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:13,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638815720] [2021-05-02 14:47:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:13,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:13,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512440131] [2021-05-02 14:47:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:13,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:47:13,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:13,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:13,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 14:47:13,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:13,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638815720] [2021-05-02 14:47:13,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:13,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512440131] [2021-05-02 14:47:13,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512440131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:13,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:13,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:47:13,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490842790] [2021-05-02 14:47:13,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:47:13,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:13,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:47:13,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:47:13,780 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:47:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:13,875 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2021-05-02 14:47:13,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:47:13,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-02 14:47:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:13,879 INFO L225 Difference]: With dead ends: 88 [2021-05-02 14:47:13,879 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 14:47:13,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:47:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 14:47:13,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 14:47:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 14:47:13,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 14:47:13,900 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 14:47:13,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:13,900 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 14:47:13,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:47:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 14:47:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 14:47:13,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:13,905 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:14,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:14,117 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:14,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:14,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-02 14:47:14,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:14,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472025594] [2021-05-02 14:47:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:14,126 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:14,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081959081] [2021-05-02 14:47:14,127 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 [2021-05-02 14:47:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:47:14,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:14,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 14:47:14,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:14,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472025594] [2021-05-02 14:47:14,385 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:14,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081959081] [2021-05-02 14:47:14,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081959081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:14,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:14,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:47:14,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112281149] [2021-05-02 14:47:14,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:47:14,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:14,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:47:14,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:14,386 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:47:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:14,607 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-05-02 14:47:14,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:47:14,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-05-02 14:47:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:14,608 INFO L225 Difference]: With dead ends: 118 [2021-05-02 14:47:14,608 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 14:47:14,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:47:14,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 14:47:14,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-02 14:47:14,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 14:47:14,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-02 14:47:14,623 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-02 14:47:14,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:14,623 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-02 14:47:14,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 14:47:14,623 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-02 14:47:14,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:47:14,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:14,624 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2021-05-02 14:47:14,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:14,841 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2021-05-02 14:47:14,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:14,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117282335] [2021-05-02 14:47:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:14,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:14,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664501308] [2021-05-02 14:47:14,851 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:14,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:47:14,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:14,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 14:47:14,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:14,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:14,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 14:47:15,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:15,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117282335] [2021-05-02 14:47:15,062 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:15,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664501308] [2021-05-02 14:47:15,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664501308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:15,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:15,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:47:15,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516996303] [2021-05-02 14:47:15,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:47:15,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:15,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:47:15,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:47:15,063 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:47:15,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:15,199 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2021-05-02 14:47:15,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:47:15,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 14:47:15,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:15,200 INFO L225 Difference]: With dead ends: 137 [2021-05-02 14:47:15,200 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 14:47:15,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:15,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 14:47:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 14:47:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 14:47:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-02 14:47:15,213 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-02 14:47:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:15,213 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-02 14:47:15,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:47:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-02 14:47:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:47:15,214 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:15,214 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 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] [2021-05-02 14:47:15,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:47:15,429 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2021-05-02 14:47:15,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:15,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56220165] [2021-05-02 14:47:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:15,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:15,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603484901] [2021-05-02 14:47:15,436 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 [2021-05-02 14:47:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:15,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:47:15,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:15,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 14:47:15,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:15,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56220165] [2021-05-02 14:47:15,641 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:15,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603484901] [2021-05-02 14:47:15,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603484901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:15,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:15,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:47:15,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985382186] [2021-05-02 14:47:15,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:47:15,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:15,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:47:15,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:47:15,643 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:47:15,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:15,809 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2021-05-02 14:47:15,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:47:15,810 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:47:15,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:15,811 INFO L225 Difference]: With dead ends: 151 [2021-05-02 14:47:15,811 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 14:47:15,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:47:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 14:47:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 14:47:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 14:47:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-02 14:47:15,822 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-02 14:47:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:15,822 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-02 14:47:15,823 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:47:15,823 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-02 14:47:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 14:47:15,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:15,823 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 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] [2021-05-02 14:47:16,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:16,026 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:16,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 2 times [2021-05-02 14:47:16,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:16,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398142606] [2021-05-02 14:47:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:16,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:16,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592626337] [2021-05-02 14:47:16,034 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:16,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:47:16,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:16,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:47:16,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:16,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 14:47:16,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:16,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398142606] [2021-05-02 14:47:16,236 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:16,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592626337] [2021-05-02 14:47:16,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592626337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:16,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:16,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:47:16,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980100182] [2021-05-02 14:47:16,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:47:16,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:16,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:47:16,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:47:16,237 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:47:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:16,394 INFO L93 Difference]: Finished difference Result 166 states and 212 transitions. [2021-05-02 14:47:16,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:47:16,395 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 14:47:16,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:16,396 INFO L225 Difference]: With dead ends: 166 [2021-05-02 14:47:16,396 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 14:47:16,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:47:16,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 14:47:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 14:47:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 14:47:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-02 14:47:16,407 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-02 14:47:16,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:16,408 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-02 14:47:16,408 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:47:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-02 14:47:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:47:16,408 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:16,409 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:16,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:16,627 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 2 times [2021-05-02 14:47:16,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:16,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680590396] [2021-05-02 14:47:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:16,636 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:16,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347723304] [2021-05-02 14:47:16,637 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 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 [2021-05-02 14:47:16,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:47:16,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:16,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:47:16,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:16,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:47:16,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:16,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680590396] [2021-05-02 14:47:16,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:16,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347723304] [2021-05-02 14:47:16,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347723304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:16,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:16,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:47:16,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887362813] [2021-05-02 14:47:16,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:47:16,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:16,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:47:16,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:47:16,906 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:47:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:17,080 INFO L93 Difference]: Finished difference Result 190 states and 241 transitions. [2021-05-02 14:47:17,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:47:17,080 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 14:47:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:17,081 INFO L225 Difference]: With dead ends: 190 [2021-05-02 14:47:17,081 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 14:47:17,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:47:17,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 14:47:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-02 14:47:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 14:47:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 14:47:17,096 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-02 14:47:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:17,096 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 14:47:17,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:47:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 14:47:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:47:17,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:17,097 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2021-05-02 14:47:17,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:47:17,313 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2021-05-02 14:47:17,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:17,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208114191] [2021-05-02 14:47:17,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:17,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:17,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598680752] [2021-05-02 14:47:17,319 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 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 [2021-05-02 14:47:17,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:47:17,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:17,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:47:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:17,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-02 14:47:17,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:17,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208114191] [2021-05-02 14:47:17,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:17,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598680752] [2021-05-02 14:47:17,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598680752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:17,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:17,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:47:17,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912273225] [2021-05-02 14:47:17,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:47:17,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:17,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:47:17,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:47:17,653 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 14:47:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:17,839 INFO L93 Difference]: Finished difference Result 213 states and 266 transitions. [2021-05-02 14:47:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:47:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 14:47:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:17,840 INFO L225 Difference]: With dead ends: 213 [2021-05-02 14:47:17,840 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 14:47:17,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 14:47:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-02 14:47:17,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 14:47:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-02 14:47:17,859 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-02 14:47:17,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:17,859 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-02 14:47:17,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 14:47:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-02 14:47:17,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:47:17,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:17,861 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1] [2021-05-02 14:47:18,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:47:18,069 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 4 times [2021-05-02 14:47:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:18,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142368] [2021-05-02 14:47:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:18,075 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:18,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146942312] [2021-05-02 14:47:18,075 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 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 [2021-05-02 14:47:18,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:47:18,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:18,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:47:18,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:18,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 53 proven. 22 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 14:47:18,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:18,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142368] [2021-05-02 14:47:18,404 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:18,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146942312] [2021-05-02 14:47:18,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146942312] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:18,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:18,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:47:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600125645] [2021-05-02 14:47:18,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:47:18,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:47:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:47:18,405 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:47:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:18,796 INFO L93 Difference]: Finished difference Result 219 states and 272 transitions. [2021-05-02 14:47:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:47:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 14:47:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:18,798 INFO L225 Difference]: With dead ends: 219 [2021-05-02 14:47:18,798 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 14:47:18,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 154.2ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:47:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 14:47:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-02 14:47:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 14:47:18,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-02 14:47:18,811 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-02 14:47:18,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:18,812 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-02 14:47:18,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:47:18,812 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-02 14:47:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 14:47:18,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:18,812 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-02 14:47:19,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:47:19,028 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:19,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2021-05-02 14:47:19,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:19,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748361636] [2021-05-02 14:47:19,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:19,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:19,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593252009] [2021-05-02 14:47:19,036 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 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 [2021-05-02 14:47:19,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:47:19,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:19,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:47:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:19,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 14:47:19,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:19,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748361636] [2021-05-02 14:47:19,272 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:19,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593252009] [2021-05-02 14:47:19,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593252009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:19,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:19,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:47:19,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908842555] [2021-05-02 14:47:19,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:47:19,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:47:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:47:19,274 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:47:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:19,601 INFO L93 Difference]: Finished difference Result 209 states and 258 transitions. [2021-05-02 14:47:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:47:19,601 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 14:47:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:19,602 INFO L225 Difference]: With dead ends: 209 [2021-05-02 14:47:19,602 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 14:47:19,602 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:47:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 14:47:19,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-05-02 14:47:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 118 states have (on average 1.152542372881356) internal successors, (136), 122 states have internal predecessors, (136), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 14:47:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 241 transitions. [2021-05-02 14:47:19,618 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 241 transitions. Word has length 79 [2021-05-02 14:47:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:19,619 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 241 transitions. [2021-05-02 14:47:19,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:47:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 241 transitions. [2021-05-02 14:47:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:47:19,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:19,620 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:47:19,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:19,835 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:19,836 INFO L82 PathProgramCache]: Analyzing trace with hash -105752765, now seen corresponding path program 5 times [2021-05-02 14:47:19,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:19,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344136333] [2021-05-02 14:47:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:19,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:19,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363867699] [2021-05-02 14:47:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:19,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 14:47:19,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:19,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:47:19,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:19,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 14:47:20,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:20,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344136333] [2021-05-02 14:47:20,028 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:20,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363867699] [2021-05-02 14:47:20,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363867699] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:20,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:20,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:47:20,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501717488] [2021-05-02 14:47:20,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:47:20,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:47:20,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:47:20,030 INFO L87 Difference]: Start difference. First operand 199 states and 241 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:47:20,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:20,150 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2021-05-02 14:47:20,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:47:20,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-05-02 14:47:20,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:20,151 INFO L225 Difference]: With dead ends: 231 [2021-05-02 14:47:20,151 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 14:47:20,151 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:47:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 14:47:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 216. [2021-05-02 14:47:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 125 states have (on average 1.16) internal successors, (145), 130 states have internal predecessors, (145), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:47:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2021-05-02 14:47:20,178 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 87 [2021-05-02 14:47:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:20,180 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2021-05-02 14:47:20,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:47:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2021-05-02 14:47:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:47:20,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:20,181 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:47:20,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:47:20,401 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:20,401 INFO L82 PathProgramCache]: Analyzing trace with hash -297024573, now seen corresponding path program 6 times [2021-05-02 14:47:20,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:20,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292683320] [2021-05-02 14:47:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:20,407 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:20,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709733593] [2021-05-02 14:47:20,407 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 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 [2021-05-02 14:47:20,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 14:47:20,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:20,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:47:20,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:20,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:47:20,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:20,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292683320] [2021-05-02 14:47:20,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:20,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709733593] [2021-05-02 14:47:20,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709733593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:20,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:20,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:47:20,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836644954] [2021-05-02 14:47:20,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:47:20,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:20,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:47:20,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:47:20,632 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:47:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:20,847 INFO L93 Difference]: Finished difference Result 241 states and 302 transitions. [2021-05-02 14:47:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:47:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 14:47:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:20,849 INFO L225 Difference]: With dead ends: 241 [2021-05-02 14:47:20,849 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 14:47:20,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:47:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 14:47:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 14:47:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 141 states have internal predecessors, (157), 69 states have call successors, (69), 30 states have call predecessors, (69), 29 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 14:47:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2021-05-02 14:47:20,867 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 87 [2021-05-02 14:47:20,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:20,867 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2021-05-02 14:47:20,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:47:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2021-05-02 14:47:20,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:47:20,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:20,868 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:47:21,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:47:21,082 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:21,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:21,082 INFO L82 PathProgramCache]: Analyzing trace with hash -239766271, now seen corresponding path program 7 times [2021-05-02 14:47:21,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:21,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382939939] [2021-05-02 14:47:21,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:21,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:21,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129579963] [2021-05-02 14:47:21,101 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 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 [2021-05-02 14:47:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:21,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:47:21,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:21,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:47:21,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382939939] [2021-05-02 14:47:21,353 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129579963] [2021-05-02 14:47:21,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129579963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:21,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:21,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:47:21,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950502873] [2021-05-02 14:47:21,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:47:21,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:21,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:47:21,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:21,354 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:47:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:21,621 INFO L93 Difference]: Finished difference Result 251 states and 315 transitions. [2021-05-02 14:47:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:47:21,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 14:47:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:21,623 INFO L225 Difference]: With dead ends: 251 [2021-05-02 14:47:21,623 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 14:47:21,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:47:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 14:47:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-05-02 14:47:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:47:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 14:47:21,644 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 14:47:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:21,644 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 14:47:21,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:47:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 14:47:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:47:21,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:21,646 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:47:21,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:47:21,853 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash 85135427, now seen corresponding path program 8 times [2021-05-02 14:47:21,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:21,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324761137] [2021-05-02 14:47:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:21,865 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:21,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929384364] [2021-05-02 14:47:21,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:21,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:47:21,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:21,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:47:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:21,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:47:22,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:22,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324761137] [2021-05-02 14:47:22,148 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:22,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929384364] [2021-05-02 14:47:22,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929384364] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:22,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:22,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:47:22,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362152354] [2021-05-02 14:47:22,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:47:22,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:22,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:47:22,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:22,151 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:47:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:22,399 INFO L93 Difference]: Finished difference Result 262 states and 331 transitions. [2021-05-02 14:47:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:47:22,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 14:47:22,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:22,401 INFO L225 Difference]: With dead ends: 262 [2021-05-02 14:47:22,401 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 14:47:22,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:47:22,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 14:47:22,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 247. [2021-05-02 14:47:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:47:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 14:47:22,420 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 14:47:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:22,420 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 14:47:22,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 14:47:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 14:47:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:47:22,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:22,421 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:47:22,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:22,629 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:22,629 INFO L82 PathProgramCache]: Analyzing trace with hash 142393729, now seen corresponding path program 9 times [2021-05-02 14:47:22,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:22,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687001120] [2021-05-02 14:47:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:22,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:22,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208659232] [2021-05-02 14:47:22,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:22,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:47:22,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:22,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:47:22,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:22,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 14:47:22,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:22,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687001120] [2021-05-02 14:47:22,859 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:22,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208659232] [2021-05-02 14:47:22,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208659232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:22,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:22,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:47:22,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518925332] [2021-05-02 14:47:22,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:47:22,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:22,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:47:22,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:22,860 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:47:29,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:29,075 INFO L93 Difference]: Finished difference Result 253 states and 315 transitions. [2021-05-02 14:47:29,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:47:29,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 14:47:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:29,076 INFO L225 Difference]: With dead ends: 253 [2021-05-02 14:47:29,076 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 14:47:29,077 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:47:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 14:47:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2021-05-02 14:47:29,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 141 states have internal predecessors, (154), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:47:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 274 transitions. [2021-05-02 14:47:29,093 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 274 transitions. Word has length 87 [2021-05-02 14:47:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:29,093 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 274 transitions. [2021-05-02 14:47:29,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:47:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 274 transitions. [2021-05-02 14:47:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:47:29,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:29,094 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 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] [2021-05-02 14:47:29,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:29,313 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:29,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash -48878079, now seen corresponding path program 10 times [2021-05-02 14:47:29,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:29,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510601431] [2021-05-02 14:47:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:29,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:29,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525690117] [2021-05-02 14:47:29,318 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 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 [2021-05-02 14:47:29,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:47:29,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:47:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:29,568 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 14:47:29,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:29,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510601431] [2021-05-02 14:47:29,568 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525690117] [2021-05-02 14:47:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525690117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:29,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:29,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:47:29,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372359551] [2021-05-02 14:47:29,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:47:29,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:29,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:47:29,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:29,570 INFO L87 Difference]: Start difference. First operand 228 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:47:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:29,810 INFO L93 Difference]: Finished difference Result 240 states and 289 transitions. [2021-05-02 14:47:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:47:29,811 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 14:47:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:29,813 INFO L225 Difference]: With dead ends: 240 [2021-05-02 14:47:29,813 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 14:47:29,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:47:29,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 14:47:29,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2021-05-02 14:47:29,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 146 states have internal predecessors, (158), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:47:29,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-05-02 14:47:29,830 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 87 [2021-05-02 14:47:29,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:29,831 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-05-02 14:47:29,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 14:47:29,831 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-05-02 14:47:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:47:29,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:29,832 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:30,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 14:47:30,045 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:30,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:30,045 INFO L82 PathProgramCache]: Analyzing trace with hash 418671986, now seen corresponding path program 3 times [2021-05-02 14:47:30,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:30,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619661519] [2021-05-02 14:47:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:30,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:30,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968024852] [2021-05-02 14:47:30,050 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 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 [2021-05-02 14:47:30,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:47:30,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:47:30,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:30,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 96 proven. 13 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-05-02 14:47:30,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:30,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619661519] [2021-05-02 14:47:30,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:30,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968024852] [2021-05-02 14:47:30,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968024852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:30,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:30,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:47:30,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257807041] [2021-05-02 14:47:30,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:47:30,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:30,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:47:30,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:47:30,275 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:47:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:34,487 INFO L93 Difference]: Finished difference Result 268 states and 323 transitions. [2021-05-02 14:47:34,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:47:34,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-05-02 14:47:34,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:34,489 INFO L225 Difference]: With dead ends: 268 [2021-05-02 14:47:34,489 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 14:47:34,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:47:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 14:47:34,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2021-05-02 14:47:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.131578947368421) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 14:47:34,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-05-02 14:47:34,510 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 92 [2021-05-02 14:47:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:34,510 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-05-02 14:47:34,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:47:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-05-02 14:47:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:47:34,511 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:34,512 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:34,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:47:34,728 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 11 times [2021-05-02 14:47:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:34,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800133693] [2021-05-02 14:47:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:34,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:34,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918969725] [2021-05-02 14:47:34,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:34,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 14:47:34,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 14:47:34,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:34,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:34,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 14:47:35,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:35,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800133693] [2021-05-02 14:47:35,075 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:35,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918969725] [2021-05-02 14:47:35,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918969725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:35,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:35,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:47:35,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243256878] [2021-05-02 14:47:35,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:47:35,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:35,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:47:35,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:35,076 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:47:35,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:35,347 INFO L93 Difference]: Finished difference Result 282 states and 339 transitions. [2021-05-02 14:47:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:47:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 14:47:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:35,349 INFO L225 Difference]: With dead ends: 282 [2021-05-02 14:47:35,349 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 14:47:35,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:47:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 14:47:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 266. [2021-05-02 14:47:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 167 states have internal predecessors, (182), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 14:47:35,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 316 transitions. [2021-05-02 14:47:35,378 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 316 transitions. Word has length 92 [2021-05-02 14:47:35,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:35,378 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 316 transitions. [2021-05-02 14:47:35,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:47:35,378 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 316 transitions. [2021-05-02 14:47:35,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:47:35,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:35,379 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:35,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:35,585 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:35,585 INFO L82 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 12 times [2021-05-02 14:47:35,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:35,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425141595] [2021-05-02 14:47:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:35,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:35,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139574285] [2021-05-02 14:47:35,591 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 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 [2021-05-02 14:47:35,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 14:47:35,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 14:47:35,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:35,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 42 proven. 47 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 14:47:35,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:35,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425141595] [2021-05-02 14:47:35,960 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:35,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139574285] [2021-05-02 14:47:35,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139574285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:35,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:35,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:47:35,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839503892] [2021-05-02 14:47:35,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:47:35,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:47:35,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:47:35,961 INFO L87 Difference]: Start difference. First operand 266 states and 316 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:47:40,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:40,203 INFO L93 Difference]: Finished difference Result 324 states and 404 transitions. [2021-05-02 14:47:40,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:47:40,204 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 92 [2021-05-02 14:47:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:40,205 INFO L225 Difference]: With dead ends: 324 [2021-05-02 14:47:40,205 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 14:47:40,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:40,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 14:47:40,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 280. [2021-05-02 14:47:40,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 173 states have internal predecessors, (190), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:47:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 340 transitions. [2021-05-02 14:47:40,226 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 340 transitions. Word has length 92 [2021-05-02 14:47:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:40,226 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 340 transitions. [2021-05-02 14:47:40,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:47:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 340 transitions. [2021-05-02 14:47:40,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 14:47:40,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:40,227 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:40,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:47:40,441 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:40,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:40,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 13 times [2021-05-02 14:47:40,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:40,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325190955] [2021-05-02 14:47:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:40,449 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:40,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [459037902] [2021-05-02 14:47:40,449 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 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 [2021-05-02 14:47:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:47:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 14:47:40,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 14:47:40,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:40,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325190955] [2021-05-02 14:47:40,756 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:40,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459037902] [2021-05-02 14:47:40,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459037902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:40,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:40,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:47:40,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549791180] [2021-05-02 14:47:40,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:47:40,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:40,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:47:40,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:47:40,760 INFO L87 Difference]: Start difference. First operand 280 states and 340 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:47:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:41,069 INFO L93 Difference]: Finished difference Result 304 states and 369 transitions. [2021-05-02 14:47:41,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:47:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 14:47:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:41,071 INFO L225 Difference]: With dead ends: 304 [2021-05-02 14:47:41,071 INFO L226 Difference]: Without dead ends: 302 [2021-05-02 14:47:41,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:47:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-02 14:47:41,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 288. [2021-05-02 14:47:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 179 states have internal predecessors, (196), 76 states have call successors, (76), 39 states have call predecessors, (76), 38 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:47:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 346 transitions. [2021-05-02 14:47:41,097 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 346 transitions. Word has length 92 [2021-05-02 14:47:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:41,098 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 346 transitions. [2021-05-02 14:47:41,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 14:47:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 346 transitions. [2021-05-02 14:47:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:47:41,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:41,099 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:41,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:47:41,310 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:41,311 INFO L82 PathProgramCache]: Analyzing trace with hash -87157341, now seen corresponding path program 14 times [2021-05-02 14:47:41,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:41,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820244975] [2021-05-02 14:47:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:41,315 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:41,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063135397] [2021-05-02 14:47:41,316 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 [2021-05-02 14:47:41,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:47:41,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:41,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 14:47:41,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:41,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-02 14:47:41,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:41,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820244975] [2021-05-02 14:47:41,611 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:41,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063135397] [2021-05-02 14:47:41,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063135397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:41,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:41,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:47:41,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326154730] [2021-05-02 14:47:41,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:47:41,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:47:41,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:47:41,615 INFO L87 Difference]: Start difference. First operand 288 states and 346 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-05-02 14:47:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:41,863 INFO L93 Difference]: Finished difference Result 328 states and 399 transitions. [2021-05-02 14:47:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:47:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 97 [2021-05-02 14:47:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:41,864 INFO L225 Difference]: With dead ends: 328 [2021-05-02 14:47:41,864 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 14:47:41,865 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:47:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 14:47:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-05-02 14:47:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 194 states have (on average 1.134020618556701) internal successors, (220), 200 states have internal predecessors, (220), 85 states have call successors, (85), 43 states have call predecessors, (85), 42 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 14:47:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 388 transitions. [2021-05-02 14:47:41,888 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 388 transitions. Word has length 97 [2021-05-02 14:47:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:41,888 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 388 transitions. [2021-05-02 14:47:41,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-05-02 14:47:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 388 transitions. [2021-05-02 14:47:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:47:41,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:47:41,889 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:47:42,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:47:42,105 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:47:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:47:42,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 15 times [2021-05-02 14:47:42,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:47:42,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450168596] [2021-05-02 14:47:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:47:42,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:47:42,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297004575] [2021-05-02 14:47:42,110 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 [2021-05-02 14:47:42,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:47:42,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:47:42,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:47:42,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:47:52,069 WARN L205 SmtUtils]: Spent 4.11 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 14:47:52,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:52,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:47:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 14:47:52,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:47:52,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450168596] [2021-05-02 14:47:52,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:47:52,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297004575] [2021-05-02 14:47:52,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297004575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:47:52,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:47:52,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:47:52,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905105219] [2021-05-02 14:47:52,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:47:52,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:47:52,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:47:52,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=86, Unknown=2, NotChecked=0, Total=110 [2021-05-02 14:47:52,112 INFO L87 Difference]: Start difference. First operand 322 states and 388 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:48:20,816 WARN L205 SmtUtils]: Spent 16.22 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-02 14:48:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:30,501 INFO L93 Difference]: Finished difference Result 359 states and 449 transitions. [2021-05-02 14:48:30,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:48:30,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 97 [2021-05-02 14:48:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:30,503 INFO L225 Difference]: With dead ends: 359 [2021-05-02 14:48:30,503 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 14:48:30,503 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 26028.5ms TimeCoverageRelationStatistics Valid=37, Invalid=143, Unknown=2, NotChecked=0, Total=182 [2021-05-02 14:48:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 14:48:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 345. [2021-05-02 14:48:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 207 states have (on average 1.1545893719806763) internal successors, (239), 213 states have internal predecessors, (239), 94 states have call successors, (94), 44 states have call predecessors, (94), 43 states have return successors, (92), 87 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-02 14:48:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 425 transitions. [2021-05-02 14:48:30,532 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 425 transitions. Word has length 97 [2021-05-02 14:48:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:30,532 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 425 transitions. [2021-05-02 14:48:30,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:48:30,532 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 425 transitions. [2021-05-02 14:48:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:48:30,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:30,533 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:30,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:48:30,745 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2021-05-02 14:48:30,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:30,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623447710] [2021-05-02 14:48:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:30,750 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:30,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493252076] [2021-05-02 14:48:30,750 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 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 [2021-05-02 14:48:30,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:48:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 14:48:30,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:30,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:30,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 67 proven. 66 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 14:48:31,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:31,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623447710] [2021-05-02 14:48:31,800 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:31,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493252076] [2021-05-02 14:48:31,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493252076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:31,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:31,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:48:31,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011740078] [2021-05-02 14:48:31,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:48:31,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:31,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:48:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:48:31,801 INFO L87 Difference]: Start difference. First operand 345 states and 425 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:48:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:32,219 INFO L93 Difference]: Finished difference Result 371 states and 462 transitions. [2021-05-02 14:48:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:48:32,220 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2021-05-02 14:48:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:32,221 INFO L225 Difference]: With dead ends: 371 [2021-05-02 14:48:32,221 INFO L226 Difference]: Without dead ends: 365 [2021-05-02 14:48:32,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 198.9ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:48:32,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-05-02 14:48:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 352. [2021-05-02 14:48:32,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 211 states have (on average 1.1516587677725119) internal successors, (243), 218 states have internal predecessors, (243), 96 states have call successors, (96), 45 states have call predecessors, (96), 44 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2021-05-02 14:48:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 433 transitions. [2021-05-02 14:48:32,253 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 433 transitions. Word has length 97 [2021-05-02 14:48:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:32,253 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 433 transitions. [2021-05-02 14:48:32,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:48:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 433 transitions. [2021-05-02 14:48:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 14:48:32,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:48:32,254 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:48:32,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:48:32,469 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:48:32,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:48:32,470 INFO L82 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 4 times [2021-05-02 14:48:32,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:48:32,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509245852] [2021-05-02 14:48:32,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:48:32,481 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:48:32,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576735685] [2021-05-02 14:48:32,481 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 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 [2021-05-02 14:48:32,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:48:32,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:48:32,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:48:32,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:48:32,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:32,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:34,836 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 14:48:35,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:48:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 36 proven. 59 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-05-02 14:48:35,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:48:35,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509245852] [2021-05-02 14:48:35,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:48:35,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576735685] [2021-05-02 14:48:35,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576735685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:48:35,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:48:35,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:48:35,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699931747] [2021-05-02 14:48:35,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:48:35,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:48:35,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:48:35,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:48:35,116 INFO L87 Difference]: Start difference. First operand 352 states and 433 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (18), 1 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:48:37,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:48:37,055 INFO L93 Difference]: Finished difference Result 386 states and 493 transitions. [2021-05-02 14:48:37,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:48:37,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (18), 1 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 14:48:37,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:48:37,057 INFO L225 Difference]: With dead ends: 386 [2021-05-02 14:48:37,057 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:48:37,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2394.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:48:37,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:48:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:48:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:48:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:48:37,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2021-05-02 14:48:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:48:37,059 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:48:37,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (18), 1 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 14:48:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:48:37,059 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:48:37,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:48:37,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:48:37,395 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 264 [2021-05-02 14:48:37,762 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 208 [2021-05-02 14:48:37,957 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 279 [2021-05-02 14:48:44,908 WARN L205 SmtUtils]: Spent 6.73 s on a formula simplification. DAG size of input: 253 DAG size of output: 27 [2021-05-02 14:48:51,945 WARN L205 SmtUtils]: Spent 7.03 s on a formula simplification. DAG size of input: 253 DAG size of output: 27 [2021-05-02 14:48:58,730 WARN L205 SmtUtils]: Spent 6.73 s on a formula simplification. DAG size of input: 253 DAG size of output: 33 [2021-05-02 14:49:09,601 WARN L205 SmtUtils]: Spent 10.85 s on a formula simplification. DAG size of input: 226 DAG size of output: 54 [2021-05-02 14:49:20,153 WARN L205 SmtUtils]: Spent 10.54 s on a formula simplification. DAG size of input: 199 DAG size of output: 20 [2021-05-02 14:49:29,180 WARN L205 SmtUtils]: Spent 9.00 s on a formula simplification. DAG size of input: 197 DAG size of output: 12 [2021-05-02 14:49:32,740 WARN L205 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 267 DAG size of output: 24 [2021-05-02 14:49:41,667 WARN L205 SmtUtils]: Spent 8.88 s on a formula simplification. DAG size of input: 197 DAG size of output: 12 [2021-05-02 14:49:41,670 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:49:41,671 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:49:41,671 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 52) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~y~0 10) (<= main_~x~0 10) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (= main_~b~0 main_~a~0) (<= 1 main_~y~0) (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)) (< 0 main_~a~0)) [2021-05-02 14:49:41,671 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (<= 0 main_~y~0)) [2021-05-02 14:49:41,671 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 59) no Hoare annotation was computed. [2021-05-02 14:49:41,672 INFO L194 CegarLoopUtils]: At program point L56(line 56) the Hoare annotation is: (let ((.cse7 (+ main_~x~0 main_~b~0)) (.cse0 (<= 1 main_~x~0)) (.cse1 (<= main_~y~0 10)) (.cse2 (<= main_~x~0 10)) (.cse3 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse4 (= main_~b~0 main_~a~0)) (.cse5 (<= 1 main_~y~0)) (.cse8 (= main_~s~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)) (< 0 main_~a~0)) (let ((.cse6 (* main_~y~0 2))) (and .cse0 .cse1 (= main_~s~0 2) (= .cse6 .cse7) .cse2 (< main_~b~0 main_~y~0) .cse3 .cse4 .cse5 (<= 0 main_~b~0) (= main_~b~0 (+ .cse6 (* main_~x~0 main_~q~0))))) (and .cse0 .cse1 (= (+ main_~q~0 1) 0) .cse2 (= main_~y~0 .cse7) .cse3 .cse4 .cse5 .cse8) (and (= main_~q~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) .cse2 .cse5 .cse8) (and (= main_~y~0 (+ (* main_~x~0 2) main_~b~0)) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 (= (+ main_~q~0 2) 0) .cse8))) [2021-05-02 14:49:41,672 INFO L194 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~y~0 10) (<= main_~x~0 10) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (= main_~b~0 main_~a~0) (<= 1 main_~y~0) (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)) (< 0 main_~a~0)) [2021-05-02 14:49:41,672 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 59) no Hoare annotation was computed. [2021-05-02 14:49:41,672 INFO L198 CegarLoopUtils]: For program point L38(lines 35 52) no Hoare annotation was computed. [2021-05-02 14:49:41,672 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (<= 1 main_~y~0) (< 0 main_~a~0)) [2021-05-02 14:49:41,672 INFO L194 CegarLoopUtils]: At program point L36-1(line 36) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (<= 1 main_~y~0) (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)) (< 0 main_~a~0)) [2021-05-02 14:49:41,672 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 59) the Hoare annotation is: true [2021-05-02 14:49:41,672 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-02 14:49:41,672 INFO L198 CegarLoopUtils]: For program point L57(line 57) no Hoare annotation was computed. [2021-05-02 14:49:41,672 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 10)) [2021-05-02 14:49:41,672 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~y~0 10) (<= 0 main_~x~0) (<= main_~x~0 10) (<= 0 main_~y~0)) [2021-05-02 14:49:41,672 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (let ((.cse1 (<= main_~y~0 10)) (.cse0 (<= 1 main_~x~0)) (.cse2 (<= main_~x~0 10)) (.cse3 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (= main_~b~0 main_~a~0) .cse3 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)) (< 0 main_~a~0)) (and (= main_~q~0 0) .cse1 .cse0 (= main_~b~0 main_~y~0) .cse2 .cse3 (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-02 14:49:41,672 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-02 14:49:41,672 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-02 14:49:41,672 INFO L198 CegarLoopUtils]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-05-02 14:49:41,672 INFO L194 CegarLoopUtils]: At program point L43-2(lines 35 52) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (<= 1 main_~y~0) (< 0 main_~a~0)) [2021-05-02 14:49:41,672 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~y~0 10) (<= 1 main_~x~0) (<= main_~x~0 10) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0) (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)) (< 0 main_~a~0)) [2021-05-02 14:49:41,673 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 14:49:41,673 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 14:49:41,673 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 14:49:41,673 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:49:41,673 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:49:41,673 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 14:49:41,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:49:41 BoogieIcfgContainer [2021-05-02 14:49:41,682 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:49:41,682 INFO L168 Benchmark]: Toolchain (without parser) took 151610.39 ms. Allocated memory was 201.3 MB in the beginning and 350.2 MB in the end (delta: 148.9 MB). Free memory was 165.6 MB in the beginning and 175.4 MB in the end (delta: -9.7 MB). Peak memory consumption was 196.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:41,682 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 201.3 MB. Free memory is still 182.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:49:41,682 INFO L168 Benchmark]: CACSL2BoogieTranslator took 134.94 ms. Allocated memory is still 201.3 MB. Free memory was 165.4 MB in the beginning and 155.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:41,682 INFO L168 Benchmark]: Boogie Preprocessor took 53.88 ms. Allocated memory is still 201.3 MB. Free memory was 155.5 MB in the beginning and 184.2 MB in the end (delta: -28.7 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:41,683 INFO L168 Benchmark]: RCFGBuilder took 231.39 ms. Allocated memory is still 201.3 MB. Free memory was 184.2 MB in the beginning and 167.0 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:41,683 INFO L168 Benchmark]: TraceAbstraction took 151185.14 ms. Allocated memory was 201.3 MB in the beginning and 350.2 MB in the end (delta: 148.9 MB). Free memory was 167.0 MB in the beginning and 175.4 MB in the end (delta: -8.3 MB). Peak memory consumption was 197.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:49:41,683 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 201.3 MB. Free memory is still 182.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 134.94 ms. Allocated memory is still 201.3 MB. Free memory was 165.4 MB in the beginning and 155.5 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.88 ms. Allocated memory is still 201.3 MB. Free memory was 155.5 MB in the beginning and 184.2 MB in the end (delta: -28.7 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 231.39 ms. Allocated memory is still 201.3 MB. Free memory was 184.2 MB in the beginning and 167.0 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 151185.14 ms. Allocated memory was 201.3 MB in the beginning and 350.2 MB in the end (delta: 148.9 MB). Free memory was 167.0 MB in the beginning and 175.4 MB in the end (delta: -8.3 MB). Peak memory consumption was 197.8 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, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 86713.6ms, OverallIterations: 29, TraceHistogramMax: 12, EmptinessCheckTime: 42.6ms, AutomataDifference: 59879.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 64397.1ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1231 SDtfs, 585 SDslu, 6606 SDs, 0 SdLazy, 6738 SolverSat, 582 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 40971.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2187 GetRequests, 1848 SyntacticMatches, 8 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 30948.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=352occurred in iteration=28, InterpolantAutomatonStates: 297, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 534.4ms AutomataMinimizationTime, 29 MinimizatonAttempts, 227 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 185 PreInvPairs, 375 NumberOfFragments, 486 HoareAnnotationTreeSize, 185 FomulaSimplifications, 7362166 FormulaSimplificationTreeSizeReduction, 895.7ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 1557627 FormulaSimplificationTreeSizeReductionInter, 63481.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 247.1ms SsaConstructionTime, 776.7ms SatisfiabilityAnalysisTime, 18353.7ms InterpolantComputationTime, 2140 NumberOfCodeBlocks, 1951 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2111 ConstructedInterpolants, 0 QuantifiedInterpolants, 11709 SizeOfPredicates, 153 NumberOfNonLiveVariables, 5735 ConjunctsInSsa, 983 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 4026/4645 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((y <= 10 && 1 <= x) && x <= 10) && 1 <= y) && 0 < a RESULT: Ultimate proved your program to be correct! Received shutdown request...