/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/prod4br-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:14:24,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:14:24,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:14:24,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 16:14:24,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 16:14:24,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 16:14:25,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 16:14:25,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 16:14:25,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 16:14:25,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 16:14:25,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 16:14:25,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 16:14:25,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:14:25,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:14:25,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:14:25,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:14:25,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:14:25,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:14:25,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:14:25,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:14:25,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:14:25,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:14:25,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:14:25,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:14:25,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:14:25,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:14:25,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:14:25,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:14:25,069 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 16:14:25,104 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:14:25,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:14:25,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:14:25,107 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:14:25,107 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:14:25,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:14:25,107 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:14:25,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:14:25,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:14:25,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:14:25,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:14:25,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:14:25,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:14:25,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:14:25,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:14:25,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:14:25,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:14:25,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:14:25,110 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:14:25,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:14:25,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:14:25,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:14:25,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:14:25,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:14:25,111 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:14:25,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:14:25,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:14:25,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:14:25,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:14:25,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:14:25,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:14:25,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:14:25,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:14:25,429 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:14:25,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-05-02 16:14:25,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c545dafde/d347d21aa6704f98916555056cdcbb41/FLAG15d3a8070 [2021-05-02 16:14:25,934 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:14:25,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound10.c [2021-05-02 16:14:25,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c545dafde/d347d21aa6704f98916555056cdcbb41/FLAG15d3a8070 [2021-05-02 16:14:25,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c545dafde/d347d21aa6704f98916555056cdcbb41 [2021-05-02 16:14:25,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:14:25,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:14:25,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:14:25,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:14:25,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:14:25,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:14:25" (1/1) ... [2021-05-02 16:14:25,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1410a4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:25, skipping insertion in model container [2021-05-02 16:14:25,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:14:25" (1/1) ... [2021-05-02 16:14:25,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:14:25,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:14:26,134 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/prod4br-ll_unwindbound10.c[524,537] [2021-05-02 16:14:26,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:14:26,172 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:14:26,199 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/prod4br-ll_unwindbound10.c[524,537] [2021-05-02 16:14:26,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:14:26,242 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:14:26,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26 WrapperNode [2021-05-02 16:14:26,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:14:26,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:14:26,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:14:26,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:14:26,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (1/1) ... [2021-05-02 16:14:26,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:14:26,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:14:26,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:14:26,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:14:26,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (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 16:14:26,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:14:26,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:14:26,358 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:14:26,358 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:14:26,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:14:26,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:14:26,358 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:14:26,358 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:14:26,359 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:14:26,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:14:26,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:14:26,360 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:14:26,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:14:26,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:14:26,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:14:26,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:14:26,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:14:26,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:14:26,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:14:26,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:14:26,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:14:26,683 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:14:26,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:14:26 BoogieIcfgContainer [2021-05-02 16:14:26,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:14:26,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:14:26,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:14:26,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:14:26,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:14:25" (1/3) ... [2021-05-02 16:14:26,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202c3b7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:14:26, skipping insertion in model container [2021-05-02 16:14:26,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:14:26" (2/3) ... [2021-05-02 16:14:26,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202c3b7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:14:26, skipping insertion in model container [2021-05-02 16:14:26,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:14:26" (3/3) ... [2021-05-02 16:14:26,690 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound10.c [2021-05-02 16:14:26,719 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:14:26,724 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:14:26,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:14:26,760 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:14:26,761 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:14:26,761 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:14:26,761 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:14:26,761 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:14:26,761 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:14:26,761 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:14:26,761 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:14:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:14:26,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 16:14:26,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:26,779 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:26,779 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:26,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:26,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2021-05-02 16:14:26,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:26,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611894901] [2021-05-02 16:14:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:26,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:14:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:26,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:14:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:27,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:27,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611894901] [2021-05-02 16:14:27,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611894901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:14:27,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:14:27,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:14:27,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281697443] [2021-05-02 16:14:27,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:14:27,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:27,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:14:27,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:14:27,032 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:14:27,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:27,151 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2021-05-02 16:14:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:14:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 16:14:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:27,158 INFO L225 Difference]: With dead ends: 56 [2021-05-02 16:14:27,159 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 16:14:27,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:14:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 16:14:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 16:14:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:14:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-05-02 16:14:27,204 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2021-05-02 16:14:27,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:27,204 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-05-02 16:14:27,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:14:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-05-02 16:14:27,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:14:27,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:27,206 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:27,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:14:27,207 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2021-05-02 16:14:27,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:27,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554451858] [2021-05-02 16:14:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:27,240 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:27,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464813710] [2021-05-02 16:14:27,240 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 16:14:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:27,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:14:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:27,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:27,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:27,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554451858] [2021-05-02 16:14:27,425 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:27,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464813710] [2021-05-02 16:14:27,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464813710] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:14:27,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:14:27,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:14:27,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511796619] [2021-05-02 16:14:27,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:14:27,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:27,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:14:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:14:27,428 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:14:27,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:27,440 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2021-05-02 16:14:27,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:14:27,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 16:14:27,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:27,442 INFO L225 Difference]: With dead ends: 37 [2021-05-02 16:14:27,442 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 16:14:27,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:14:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 16:14:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 16:14:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:14:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 16:14:27,453 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2021-05-02 16:14:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:27,453 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 16:14:27,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:14:27,453 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 16:14:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 16:14:27,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:27,454 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:27,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:14:27,655 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 1 times [2021-05-02 16:14:27,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:27,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491698598] [2021-05-02 16:14:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:27,668 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:27,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696529282] [2021-05-02 16:14:27,669 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 16:14:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:27,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:14:27,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:27,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:27,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:27,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491698598] [2021-05-02 16:14:27,874 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:27,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696529282] [2021-05-02 16:14:27,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696529282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:14:27,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:14:27,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 16:14:27,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626403641] [2021-05-02 16:14:27,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:14:27,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:14:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:14:27,876 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:14:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:28,022 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2021-05-02 16:14:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:14:28,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 16:14:28,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:28,023 INFO L225 Difference]: With dead ends: 42 [2021-05-02 16:14:28,023 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 16:14:28,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:14:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 16:14:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-05-02 16:14:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:14:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-05-02 16:14:28,030 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2021-05-02 16:14:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:28,030 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-05-02 16:14:28,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 16:14:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-05-02 16:14:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 16:14:28,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:28,031 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:28,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:28,245 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 1 times [2021-05-02 16:14:28,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:28,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270647505] [2021-05-02 16:14:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:28,269 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:28,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250603137] [2021-05-02 16:14:28,270 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 16:14:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:28,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:14:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:28,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:28,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:28,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270647505] [2021-05-02 16:14:28,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:28,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250603137] [2021-05-02 16:14:28,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250603137] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:28,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:28,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:14:28,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361426936] [2021-05-02 16:14:28,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:14:28,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:28,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:14:28,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:14:28,628 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:29,336 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-05-02 16:14:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:14:29,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 16:14:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:29,338 INFO L225 Difference]: With dead ends: 51 [2021-05-02 16:14:29,338 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 16:14:29,339 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:14:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 16:14:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 16:14:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 29 states have internal predecessors, (36), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:14:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-05-02 16:14:29,347 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2021-05-02 16:14:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:29,347 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-05-02 16:14:29,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-05-02 16:14:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 16:14:29,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:29,348 INFO L523 BasicCegarLoop]: trace histogram [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 16:14:29,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:29,561 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 1 times [2021-05-02 16:14:29,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:29,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338368264] [2021-05-02 16:14:29,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:29,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:29,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351240652] [2021-05-02 16:14:29,580 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 16:14:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:29,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:14:29,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:29,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:29,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:29,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338368264] [2021-05-02 16:14:29,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:29,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351240652] [2021-05-02 16:14:29,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351240652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:29,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:29,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:14:29,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304874057] [2021-05-02 16:14:29,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:14:29,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:29,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:14:29,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:14:29,786 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:14:29,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:29,833 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-05-02 16:14:29,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:14:29,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2021-05-02 16:14:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:29,834 INFO L225 Difference]: With dead ends: 56 [2021-05-02 16:14:29,834 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 16:14:29,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:14:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 16:14:29,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 16:14:29,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 36 states have internal predecessors, (47), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:14:29,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2021-05-02 16:14:29,842 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 27 [2021-05-02 16:14:29,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:29,842 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2021-05-02 16:14:29,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:14:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2021-05-02 16:14:29,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 16:14:29,843 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:29,844 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:30,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:30,057 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1799714694, now seen corresponding path program 1 times [2021-05-02 16:14:30,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:30,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689900549] [2021-05-02 16:14:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:30,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:30,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586449747] [2021-05-02 16:14:30,065 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 16:14:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:30,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:14:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:30,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:30,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689900549] [2021-05-02 16:14:30,481 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586449747] [2021-05-02 16:14:30,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586449747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:30,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:30,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:14:30,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284493829] [2021-05-02 16:14:30,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:14:30,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:30,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:14:30,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:14:30,483 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:35,024 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2021-05-02 16:14:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:14:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-05-02 16:14:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:35,026 INFO L225 Difference]: With dead ends: 63 [2021-05-02 16:14:35,026 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 16:14:35,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:14:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 16:14:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-02 16:14:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.3) internal successors, (52), 42 states have internal predecessors, (52), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:14:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 16:14:35,034 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 27 [2021-05-02 16:14:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:35,034 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 16:14:35,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 16:14:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:14:35,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:35,035 INFO L523 BasicCegarLoop]: trace histogram [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 16:14:35,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:35,245 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:35,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:35,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1357155568, now seen corresponding path program 1 times [2021-05-02 16:14:35,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:35,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432153780] [2021-05-02 16:14:35,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:35,264 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:35,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346376693] [2021-05-02 16:14:35,264 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 16:14:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:35,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:14:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:35,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:35,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:35,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:35,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:35,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:35,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432153780] [2021-05-02 16:14:35,569 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:35,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346376693] [2021-05-02 16:14:35,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346376693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:35,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:35,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:14:35,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211402203] [2021-05-02 16:14:35,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:14:35,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:35,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:14:35,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:14:35,573 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:40,055 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-05-02 16:14:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:14:40,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 16:14:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:40,056 INFO L225 Difference]: With dead ends: 79 [2021-05-02 16:14:40,056 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 16:14:40,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:14:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 16:14:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 16:14:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:14:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2021-05-02 16:14:40,064 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 28 [2021-05-02 16:14:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:40,064 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2021-05-02 16:14:40,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2021-05-02 16:14:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:14:40,065 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:40,065 INFO L523 BasicCegarLoop]: trace histogram [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 16:14:40,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:40,275 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:40,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:40,275 INFO L82 PathProgramCache]: Analyzing trace with hash -293334773, now seen corresponding path program 1 times [2021-05-02 16:14:40,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:40,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334372538] [2021-05-02 16:14:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:40,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:40,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208518149] [2021-05-02 16:14:40,283 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 16:14:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:40,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 16:14:40,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:40,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:40,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:40,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:40,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:40,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334372538] [2021-05-02 16:14:40,563 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:40,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208518149] [2021-05-02 16:14:40,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208518149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:40,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:40,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:14:40,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907979943] [2021-05-02 16:14:40,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:14:40,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:40,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:14:40,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:14:40,565 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:45,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:45,107 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2021-05-02 16:14:45,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:14:45,108 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 16:14:45,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:45,109 INFO L225 Difference]: With dead ends: 92 [2021-05-02 16:14:45,109 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 16:14:45,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:14:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 16:14:45,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-05-02 16:14:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.290909090909091) internal successors, (71), 57 states have internal predecessors, (71), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:14:45,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2021-05-02 16:14:45,118 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 29 [2021-05-02 16:14:45,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:45,118 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2021-05-02 16:14:45,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2021-05-02 16:14:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:14:45,119 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:45,120 INFO L523 BasicCegarLoop]: trace histogram [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 16:14:45,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:45,321 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1481672589, now seen corresponding path program 1 times [2021-05-02 16:14:45,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:45,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376302911] [2021-05-02 16:14:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:45,329 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:45,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49596274] [2021-05-02 16:14:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:45,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 16:14:45,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:45,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:45,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:45,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376302911] [2021-05-02 16:14:45,613 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:45,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49596274] [2021-05-02 16:14:45,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49596274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:45,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:45,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:14:45,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32522006] [2021-05-02 16:14:45,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:14:45,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:45,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:14:45,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:14:45,614 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:45,853 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2021-05-02 16:14:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:14:45,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 16:14:45,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:45,855 INFO L225 Difference]: With dead ends: 87 [2021-05-02 16:14:45,855 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 16:14:45,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:14:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 16:14:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 72. [2021-05-02 16:14:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 55 states have internal predecessors, (69), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:14:45,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2021-05-02 16:14:45,864 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 29 [2021-05-02 16:14:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:45,864 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2021-05-02 16:14:45,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:14:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2021-05-02 16:14:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 16:14:45,865 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:45,865 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 16:14:46,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 16:14:46,077 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:46,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1680888588, now seen corresponding path program 1 times [2021-05-02 16:14:46,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:46,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588838334] [2021-05-02 16:14:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:46,084 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:46,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432740122] [2021-05-02 16:14:46,085 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 16:14:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 16:14:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:46,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:14:46,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:46,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588838334] [2021-05-02 16:14:46,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432740122] [2021-05-02 16:14:46,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432740122] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:14:46,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:14:46,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 16:14:46,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420550892] [2021-05-02 16:14:46,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:14:46,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:46,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:14:46,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:14:46,268 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:46,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:46,386 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-05-02 16:14:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:14:46,387 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-05-02 16:14:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:46,387 INFO L225 Difference]: With dead ends: 98 [2021-05-02 16:14:46,388 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 16:14:46,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:14:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 16:14:46,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2021-05-02 16:14:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 66 states have internal predecessors, (84), 14 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:14:46,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-05-02 16:14:46,397 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 33 [2021-05-02 16:14:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:46,397 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-05-02 16:14:46,397 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), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-05-02 16:14:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 16:14:46,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:46,398 INFO L523 BasicCegarLoop]: trace histogram [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 16:14:46,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:46,615 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:46,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:46,615 INFO L82 PathProgramCache]: Analyzing trace with hash 368374993, now seen corresponding path program 1 times [2021-05-02 16:14:46,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:46,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295839168] [2021-05-02 16:14:46,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:46,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:46,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1725103667] [2021-05-02 16:14:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:46,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:14:46,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:46,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:14:46,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:46,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295839168] [2021-05-02 16:14:46,976 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:46,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725103667] [2021-05-02 16:14:46,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725103667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:46,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:46,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:14:46,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300026161] [2021-05-02 16:14:46,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:14:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:14:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:14:46,978 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:49,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:49,363 INFO L93 Difference]: Finished difference Result 103 states and 137 transitions. [2021-05-02 16:14:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 16:14:49,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 16:14:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:49,365 INFO L225 Difference]: With dead ends: 103 [2021-05-02 16:14:49,365 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 16:14:49,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:14:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 16:14:49,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-05-02 16:14:49,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 73 states have internal predecessors, (92), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:14:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2021-05-02 16:14:49,377 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 35 [2021-05-02 16:14:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:49,377 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2021-05-02 16:14:49,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2021-05-02 16:14:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 16:14:49,383 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:49,383 INFO L523 BasicCegarLoop]: trace histogram [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 16:14:49,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 16:14:49,593 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:49,593 INFO L82 PathProgramCache]: Analyzing trace with hash -218431021, now seen corresponding path program 1 times [2021-05-02 16:14:49,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:49,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298667075] [2021-05-02 16:14:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:49,613 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:49,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [298058930] [2021-05-02 16:14:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:14:49,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:14:49,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:49,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:14:49,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298667075] [2021-05-02 16:14:49,988 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:49,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298058930] [2021-05-02 16:14:49,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298058930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:49,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:49,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:14:49,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26247980] [2021-05-02 16:14:49,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:14:49,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:49,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:14:49,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:14:49,989 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:50,685 INFO L93 Difference]: Finished difference Result 123 states and 163 transitions. [2021-05-02 16:14:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 16:14:50,685 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2021-05-02 16:14:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:50,687 INFO L225 Difference]: With dead ends: 123 [2021-05-02 16:14:50,687 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 16:14:50,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:14:50,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 16:14:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-02 16:14:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 79 states have internal predecessors, (101), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:14:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2021-05-02 16:14:50,696 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 35 [2021-05-02 16:14:50,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:50,696 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 133 transitions. [2021-05-02 16:14:50,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:14:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 133 transitions. [2021-05-02 16:14:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:14:50,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:50,697 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:50,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 16:14:50,920 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:50,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:50,920 INFO L82 PathProgramCache]: Analyzing trace with hash 604176890, now seen corresponding path program 2 times [2021-05-02 16:14:50,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:50,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339086543] [2021-05-02 16:14:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:50,928 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:50,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672647449] [2021-05-02 16:14:50,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:50,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:14:50,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:14:50,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:14:50,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:50,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:50,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:50,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:14:51,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:14:51,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339086543] [2021-05-02 16:14:51,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:14:51,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672647449] [2021-05-02 16:14:51,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672647449] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:14:51,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:14:51,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:14:51,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541901962] [2021-05-02 16:14:51,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:14:51,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:14:51,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:14:51,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:14:51,079 INFO L87 Difference]: Start difference. First operand 101 states and 133 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:14:51,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:14:51,130 INFO L93 Difference]: Finished difference Result 128 states and 171 transitions. [2021-05-02 16:14:51,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:14:51,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 16:14:51,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:14:51,132 INFO L225 Difference]: With dead ends: 128 [2021-05-02 16:14:51,132 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 16:14:51,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:14:51,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 16:14:51,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-05-02 16:14:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.3297872340425532) internal successors, (125), 96 states have internal predecessors, (125), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:14:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 157 transitions. [2021-05-02 16:14:51,141 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 157 transitions. Word has length 36 [2021-05-02 16:14:51,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:14:51,141 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 157 transitions. [2021-05-02 16:14:51,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:14:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 157 transitions. [2021-05-02 16:14:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:14:51,142 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:14:51,142 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:14:51,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:14:51,357 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:14:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:14:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash 605964350, now seen corresponding path program 2 times [2021-05-02 16:14:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:14:51,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871643752] [2021-05-02 16:14:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:14:51,363 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:14:51,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584148535] [2021-05-02 16:14:51,363 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 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 16:14:51,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:14:51,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:14:51,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 16:14:51,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:14:51,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:14:51,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:10,194 WARN L205 SmtUtils]: Spent 16.59 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 16:15:22,413 WARN L205 SmtUtils]: Spent 12.16 s on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-05-02 16:15:22,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:22,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:24,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:24,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:24,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:24,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:24,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:15:24,365 WARN L159 QuantifierPusher]: Ignoring assumption.