/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:46:09,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:46:09,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:46:09,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:46:09,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:46:09,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:46:09,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:46:09,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:46:09,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:46:09,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:46:09,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:46:09,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:46:09,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:46:09,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:46:09,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:46:09,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:46:09,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:46:09,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:46:09,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:46:09,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:46:09,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:46:09,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:46:09,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:46:09,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:46:09,356 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:46:09,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:46:09,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:46:09,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:46:09,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:46:09,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:46:09,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:46:09,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:46:09,392 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:46:09,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:46:09,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:46:09,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:46:09,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:46:09,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:46:09,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:46:09,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:46:09,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:46:09,393 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:46:09,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:46:09,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:46:09,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:46:09,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:46:09,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:46:09,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:46:09,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:46:09,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:46:09,395 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:46:09,395 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:46:09,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:46:09,650 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:46:09,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:46:09,652 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:46:09,653 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:46:09,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-05-02 22:46:09,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db81f90c2/9049e10c5fcf464faea2951b8d3242ff/FLAG45a09fd7f [2021-05-02 22:46:10,071 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:46:10,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-05-02 22:46:10,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db81f90c2/9049e10c5fcf464faea2951b8d3242ff/FLAG45a09fd7f [2021-05-02 22:46:10,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db81f90c2/9049e10c5fcf464faea2951b8d3242ff [2021-05-02 22:46:10,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:46:10,502 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:46:10,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:46:10,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:46:10,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:46:10,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:10,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4b85d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10, skipping insertion in model container [2021-05-02 22:46:10,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:10,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:46:10,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:46:10,607 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/ps6-ll_valuebound5.c[458,471] [2021-05-02 22:46:10,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:46:10,622 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:46:10,630 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/ps6-ll_valuebound5.c[458,471] [2021-05-02 22:46:10,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:46:10,670 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:46:10,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10 WrapperNode [2021-05-02 22:46:10,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:46:10,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:46:10,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:46:10,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:46:10,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:10,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:10,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:10,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:10,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:10,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:10,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:10,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:46:10,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:46:10,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:46:10,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:46:10,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:46:10,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:46:10,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:46:10,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:46:10,793 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:46:10,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:46:10,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:46:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:46:10,793 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:46:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:46:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:46:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:46:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:46:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:46:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:46:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:46:10,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:46:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:46:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:46:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:46:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:46:10,991 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:46:10,992 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:46:10,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:46:10 BoogieIcfgContainer [2021-05-02 22:46:10,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:46:10,993 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:46:10,993 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:46:11,001 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:46:11,003 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:46:10" (1/1) ... [2021-05-02 22:46:11,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:46:11 BasicIcfg [2021-05-02 22:46:11,014 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:46:11,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:46:11,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:46:11,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:46:11,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:46:10" (1/4) ... [2021-05-02 22:46:11,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b0582a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:46:11, skipping insertion in model container [2021-05-02 22:46:11,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:46:10" (2/4) ... [2021-05-02 22:46:11,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b0582a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:46:11, skipping insertion in model container [2021-05-02 22:46:11,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:46:10" (3/4) ... [2021-05-02 22:46:11,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b0582a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:46:11, skipping insertion in model container [2021-05-02 22:46:11,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:46:11" (4/4) ... [2021-05-02 22:46:11,019 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.cJordan [2021-05-02 22:46:11,023 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:46:11,026 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:46:11,050 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:46:11,085 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:46:11,085 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:46:11,085 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:46:11,085 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:46:11,085 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:46:11,085 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:46:11,085 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:46:11,085 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:46:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:46:11,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:46:11,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:11,099 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:11,099 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-02 22:46:11,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:11,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443057702] [2021-05-02 22:46:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:11,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:46:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:11,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:46:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:11,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 22:46:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:46:11,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:11,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443057702] [2021-05-02 22:46:11,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443057702] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:46:11,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:46:11,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:46:11,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964317707] [2021-05-02 22:46:11,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:46:11,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:11,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:46:11,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:46:11,354 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:46:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:13,508 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 22:46:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:46:13,509 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 22:46:13,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:13,514 INFO L225 Difference]: With dead ends: 29 [2021-05-02 22:46:13,514 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 22:46:13,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:46:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 22:46:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 22:46:13,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:46:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 22:46:13,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 22:46:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:13,539 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 22:46:13,539 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:46:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 22:46:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 22:46:13,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:13,541 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:13,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:46:13,541 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-02 22:46:13,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:13,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031330736] [2021-05-02 22:46:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:13,553 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:13,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668740848] [2021-05-02 22:46:13,553 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 22:46:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:13,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:46:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:13,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:46:13,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:13,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031330736] [2021-05-02 22:46:13,822 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:13,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668740848] [2021-05-02 22:46:13,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668740848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:13,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:13,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:46:13,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906170101] [2021-05-02 22:46:13,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:46:13,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:46:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:46:13,827 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:46:14,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:14,035 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-02 22:46:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:46:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 22:46:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:14,036 INFO L225 Difference]: With dead ends: 33 [2021-05-02 22:46:14,036 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 22:46:14,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:46:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 22:46:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 22:46:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 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 22:46:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 22:46:14,042 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 22:46:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:14,043 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 22:46:14,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:46:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 22:46:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 22:46:14,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:14,044 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:14,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:46:14,248 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:14,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:14,248 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-02 22:46:14,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:14,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197927352] [2021-05-02 22:46:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:14,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:14,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151848421] [2021-05-02 22:46:14,257 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 22:46:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:14,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:46:14,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:14,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:14,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:46:14,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:14,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197927352] [2021-05-02 22:46:14,395 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:14,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151848421] [2021-05-02 22:46:14,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151848421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:14,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:14,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:46:14,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458598205] [2021-05-02 22:46:14,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:46:14,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:14,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:46:14,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:46:14,396 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:46:14,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:14,467 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 22:46:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:46:14,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 22:46:14,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:14,468 INFO L225 Difference]: With dead ends: 40 [2021-05-02 22:46:14,468 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 22:46:14,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:46:14,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 22:46:14,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 22:46:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:46:14,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 22:46:14,472 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 22:46:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:14,473 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 22:46:14,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 22:46:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 22:46:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:46:14,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:14,474 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:14,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:14,681 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:14,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-02 22:46:14,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:14,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099961262] [2021-05-02 22:46:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:14,689 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:14,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670972885] [2021-05-02 22:46:14,690 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 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 22:46:14,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:46:14,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:14,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 22:46:14,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:14,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:14,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:14,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 22:46:14,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:14,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099961262] [2021-05-02 22:46:14,965 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:14,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670972885] [2021-05-02 22:46:14,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670972885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:14,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:14,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:46:14,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795070876] [2021-05-02 22:46:14,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:46:14,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:14,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:46:14,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:46:14,966 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:46:17,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:17,123 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-02 22:46:17,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:46:17,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 22:46:17,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:17,124 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:46:17,124 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:46:17,125 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:46:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:46:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-02 22:46:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:46:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-02 22:46:17,132 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-02 22:46:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:17,133 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-02 22:46:17,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 22:46:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-02 22:46:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 22:46:17,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:17,134 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:17,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:17,335 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:17,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:17,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-02 22:46:17,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:17,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711800819] [2021-05-02 22:46:17,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:17,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:17,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283300973] [2021-05-02 22:46:17,348 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 22:46:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:46:17,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:46:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:17,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 22:46:17,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:17,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711800819] [2021-05-02 22:46:17,691 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:17,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283300973] [2021-05-02 22:46:17,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283300973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:17,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:17,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:46:17,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100745870] [2021-05-02 22:46:17,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:46:17,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:17,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:46:17,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:46:17,693 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 22:46:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:19,829 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-02 22:46:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 22:46:19,830 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2021-05-02 22:46:19,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:19,831 INFO L225 Difference]: With dead ends: 54 [2021-05-02 22:46:19,831 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:46:19,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:46:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:46:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:46:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:46:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 22:46:19,836 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-02 22:46:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:19,836 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 22:46:19,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 22:46:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 22:46:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 22:46:19,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:19,837 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:20,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:20,038 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:20,038 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-02 22:46:20,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:20,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416540234] [2021-05-02 22:46:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:20,046 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:20,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218712028] [2021-05-02 22:46:20,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:46:20,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:46:20,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:20,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:46:20,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:20,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,203 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 22:46:20,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:20,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416540234] [2021-05-02 22:46:20,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:20,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218712028] [2021-05-02 22:46:20,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218712028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:20,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:20,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:46:20,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806320072] [2021-05-02 22:46:20,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:46:20,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:20,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:46:20,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:46:20,205 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 22:46:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:20,265 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 22:46:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:46:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 22:46:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:20,266 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:46:20,266 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:46:20,266 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:46:20,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:46:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-02 22:46:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:46:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 22:46:20,270 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-02 22:46:20,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:20,270 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 22:46:20,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 22:46:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 22:46:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 22:46:20,271 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:20,271 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:20,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 22:46:20,481 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:20,481 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-02 22:46:20,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:20,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854631233] [2021-05-02 22:46:20,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:20,488 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:20,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054708335] [2021-05-02 22:46:20,489 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 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 22:46:20,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:46:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:20,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 22:46:20,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:20,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 22:46:20,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:20,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854631233] [2021-05-02 22:46:20,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:20,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054708335] [2021-05-02 22:46:20,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054708335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:20,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:20,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:46:20,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559910156] [2021-05-02 22:46:20,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:46:20,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:20,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:46:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:46:20,753 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 22:46:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:20,896 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-02 22:46:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:46:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-02 22:46:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:20,899 INFO L225 Difference]: With dead ends: 49 [2021-05-02 22:46:20,899 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:46:20,899 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:46:20,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:46:20,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 22:46:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:46:20,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 22:46:20,902 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-02 22:46:20,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:20,902 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 22:46:20,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 22:46:20,902 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 22:46:20,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 22:46:20,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:20,903 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:21,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:21,117 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:21,117 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-02 22:46:21,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:21,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366085311] [2021-05-02 22:46:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:21,125 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:21,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535886983] [2021-05-02 22:46:21,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:46:21,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:46:21,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:21,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 22:46:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:21,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-02 22:46:21,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:21,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366085311] [2021-05-02 22:46:21,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:21,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535886983] [2021-05-02 22:46:21,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535886983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:21,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:21,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:46:21,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821248258] [2021-05-02 22:46:21,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:46:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:46:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:46:21,522 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 22:46:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:23,910 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-05-02 22:46:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 22:46:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-02 22:46:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:23,911 INFO L225 Difference]: With dead ends: 52 [2021-05-02 22:46:23,911 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:46:23,912 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:46:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:46:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:46:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:46:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 22:46:23,915 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-02 22:46:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:23,915 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 22:46:23,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 22:46:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 22:46:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 22:46:23,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:23,916 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:24,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:46:24,119 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:24,120 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-02 22:46:24,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:24,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963414682] [2021-05-02 22:46:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:24,138 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:24,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313672799] [2021-05-02 22:46:24,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:46:24,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:46:24,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 22:46:24,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:24,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 22:46:24,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:24,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963414682] [2021-05-02 22:46:24,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:24,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313672799] [2021-05-02 22:46:24,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313672799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:24,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:24,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:46:24,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218904203] [2021-05-02 22:46:24,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:46:24,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:24,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:46:24,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:46:24,400 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 22:46:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:24,588 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2021-05-02 22:46:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:46:24,588 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 61 [2021-05-02 22:46:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:24,589 INFO L225 Difference]: With dead ends: 55 [2021-05-02 22:46:24,589 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 22:46:24,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:46:24,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 22:46:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 22:46:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:46:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 22:46:24,595 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-02 22:46:24,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:24,595 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 22:46:24,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 22:46:24,595 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 22:46:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:46:24,596 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:24,596 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:24,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 22:46:24,814 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-02 22:46:24,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:24,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931809760] [2021-05-02 22:46:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:24,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:24,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458166884] [2021-05-02 22:46:24,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:46:25,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:46:25,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:25,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 22:46:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:25,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 22:46:25,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:25,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931809760] [2021-05-02 22:46:25,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:25,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458166884] [2021-05-02 22:46:25,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458166884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:25,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:25,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 22:46:25,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57286648] [2021-05-02 22:46:25,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 22:46:25,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:25,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 22:46:25,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:46:25,794 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 22:46:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:26,008 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-02 22:46:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 22:46:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-02 22:46:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:26,009 INFO L225 Difference]: With dead ends: 58 [2021-05-02 22:46:26,009 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 22:46:26,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:46:26,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 22:46:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-05-02 22:46:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:46:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-02 22:46:26,012 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-02 22:46:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:26,012 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-02 22:46:26,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 22:46:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-02 22:46:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 22:46:26,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:46:26,013 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:46:26,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:46:26,218 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:46:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:46:26,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1505202147, now seen corresponding path program 6 times [2021-05-02 22:46:26,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:46:26,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451426619] [2021-05-02 22:46:26,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:46:26,224 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:46:26,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630847791] [2021-05-02 22:46:26,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:46:26,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:46:26,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:46:26,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 22:46:26,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:46:26,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:46:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 123 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 22:46:26,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:46:26,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451426619] [2021-05-02 22:46:26,778 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:46:26,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630847791] [2021-05-02 22:46:26,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630847791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:46:26,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:46:26,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:46:26,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522931763] [2021-05-02 22:46:26,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:46:26,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:46:26,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:46:26,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:46:26,780 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-02 22:46:36,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:46:36,744 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-05-02 22:46:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:46:36,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2021-05-02 22:46:36,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:46:36,745 INFO L225 Difference]: With dead ends: 45 [2021-05-02 22:46:36,745 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 22:46:36,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:46:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 22:46:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 22:46:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 22:46:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 22:46:36,745 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-05-02 22:46:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:46:36,745 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 22:46:36,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-02 22:46:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 22:46:36,746 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 22:46:36,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 22:46:36,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:46:36 BasicIcfg [2021-05-02 22:46:36,953 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:46:36,953 INFO L168 Benchmark]: Toolchain (without parser) took 26451.32 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 160.5 MB in the beginning and 175.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:36,954 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 177.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:46:36,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.20 ms. Allocated memory is still 195.0 MB. Free memory was 160.2 MB in the beginning and 179.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:36,954 INFO L168 Benchmark]: Boogie Preprocessor took 44.01 ms. Allocated memory is still 195.0 MB. Free memory was 179.1 MB in the beginning and 177.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:36,954 INFO L168 Benchmark]: RCFGBuilder took 274.85 ms. Allocated memory is still 195.0 MB. Free memory was 177.4 MB in the beginning and 163.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:36,954 INFO L168 Benchmark]: IcfgTransformer took 20.99 ms. Allocated memory is still 195.0 MB. Free memory was 163.1 MB in the beginning and 162.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:36,954 INFO L168 Benchmark]: TraceAbstraction took 25937.83 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 161.3 MB in the beginning and 175.0 MB in the end (delta: -13.7 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. [2021-05-02 22:46:36,954 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 195.0 MB. Free memory is still 177.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 167.20 ms. Allocated memory is still 195.0 MB. Free memory was 160.2 MB in the beginning and 179.1 MB in the end (delta: -18.9 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.01 ms. Allocated memory is still 195.0 MB. Free memory was 179.1 MB in the beginning and 177.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 274.85 ms. Allocated memory is still 195.0 MB. Free memory was 177.4 MB in the beginning and 163.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 20.99 ms. Allocated memory is still 195.0 MB. Free memory was 163.1 MB in the beginning and 162.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25937.83 ms. Allocated memory was 195.0 MB in the beginning and 234.9 MB in the end (delta: 39.8 MB). Free memory was 161.3 MB in the beginning and 175.0 MB in the end (delta: -13.7 MB). Peak memory consumption was 26.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25867.2ms, OverallIterations: 11, TraceHistogramMax: 9, EmptinessCheckTime: 13.8ms, AutomataDifference: 19725.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 307 SDtfs, 132 SDslu, 1607 SDs, 0 SdLazy, 1184 SolverSat, 81 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 19030.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 499 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 863.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=10, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 51.1ms AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 92.8ms SsaConstructionTime, 1348.9ms SatisfiabilityAnalysisTime, 2100.5ms InterpolantComputationTime, 497 NumberOfCodeBlocks, 474 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 486 ConstructedInterpolants, 0 QuantifiedInterpolants, 1847 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1588 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 510/662 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...