/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/ps5-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:38:02,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:38:02,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:38:02,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:38:02,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:38:02,111 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:38:02,112 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:38:02,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:38:02,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:38:02,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:38:02,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:38:02,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:38:02,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:38:02,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:38:02,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:38:02,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:38:02,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:38:02,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:38:02,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:38:02,134 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:38:02,135 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:38:02,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:38:02,138 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:38:02,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:38:02,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:38:02,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:38:02,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:38:02,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:38:02,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:38:02,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:38:02,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:38:02,164 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:38:02,164 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:38:02,164 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:38:02,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:38:02,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:38:02,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:38:02,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:38:02,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:38:02,165 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:38:02,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:38:02,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:38:02,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:38:02,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:38:02,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:38:02,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:38:02,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:38:02,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:38:02,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:38:02,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:38:02,168 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:38:02,168 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:38:02,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:38:02,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:38:02,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:38:02,439 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:38:02,440 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:38:02,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound20.c [2021-05-06 10:38:02,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbde50773/0a60f6d9796346ebb756e54bbca383dd/FLAGff3dd9f27 [2021-05-06 10:38:02,831 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:38:02,832 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_valuebound20.c [2021-05-06 10:38:02,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbde50773/0a60f6d9796346ebb756e54bbca383dd/FLAGff3dd9f27 [2021-05-06 10:38:02,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cbde50773/0a60f6d9796346ebb756e54bbca383dd [2021-05-06 10:38:02,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:38:02,863 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:38:02,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:38:02,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:38:02,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:38:02,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:38:02" (1/1) ... [2021-05-06 10:38:02,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70e51874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:02, skipping insertion in model container [2021-05-06 10:38:02,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:38:02" (1/1) ... [2021-05-06 10:38:02,876 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:38:02,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:38:02,996 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/ps5-ll_valuebound20.c[458,471] [2021-05-06 10:38:03,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:38:03,021 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:38:03,062 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/ps5-ll_valuebound20.c[458,471] [2021-05-06 10:38:03,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:38:03,087 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:38:03,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03 WrapperNode [2021-05-06 10:38:03,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:38:03,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:38:03,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:38:03,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:38:03,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03" (1/1) ... [2021-05-06 10:38:03,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03" (1/1) ... [2021-05-06 10:38:03,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03" (1/1) ... [2021-05-06 10:38:03,105 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03" (1/1) ... [2021-05-06 10:38:03,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03" (1/1) ... [2021-05-06 10:38:03,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03" (1/1) ... [2021-05-06 10:38:03,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03" (1/1) ... [2021-05-06 10:38:03,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:38:03,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:38:03,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:38:03,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:38:03,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:38:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:38:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:38:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:38:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:38:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:38:03,191 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:38:03,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:38:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:38:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:38:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:38:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:38:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:38:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:38:03,192 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:38:03,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:38:03,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:38:03,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:38:03,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:38:03,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:38:03,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:38:03,385 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:38:03,385 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:38:03,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:38:03 BoogieIcfgContainer [2021-05-06 10:38:03,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:38:03,387 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:38:03,387 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:38:03,387 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:38:03,389 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:38:03" (1/1) ... [2021-05-06 10:38:03,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:38:03 BasicIcfg [2021-05-06 10:38:03,399 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:38:03,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:38:03,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:38:03,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:38:03,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:38:02" (1/4) ... [2021-05-06 10:38:03,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cdb3327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:38:03, skipping insertion in model container [2021-05-06 10:38:03,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:38:03" (2/4) ... [2021-05-06 10:38:03,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cdb3327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:38:03, skipping insertion in model container [2021-05-06 10:38:03,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:38:03" (3/4) ... [2021-05-06 10:38:03,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cdb3327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:38:03, skipping insertion in model container [2021-05-06 10:38:03,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:38:03" (4/4) ... [2021-05-06 10:38:03,404 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound20.cJordan [2021-05-06 10:38:03,407 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:38:03,418 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:38:03,433 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:38:03,459 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:38:03,459 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:38:03,459 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:38:03,459 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:38:03,459 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:38:03,459 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:38:03,460 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:38:03,460 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:38:03,468 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) [2021-05-06 10:38:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:38:03,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:03,473 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:03,473 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:03,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:03,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1187991702, now seen corresponding path program 1 times [2021-05-06 10:38:03,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:03,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180656022] [2021-05-06 10:38:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:03,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:38:03,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:38:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:38:03,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 10:38:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:38:03,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 10:38:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:38:03,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:38:03,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:03,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180656022] [2021-05-06 10:38:03,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180656022] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:38:03,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:38:03,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:38:03,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568553874] [2021-05-06 10:38:03,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:38:03,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:03,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:38:03,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:38:03,712 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) [2021-05-06 10:38:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:03,769 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-06 10:38:03,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:38:03,771 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 [2021-05-06 10:38:03,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:03,776 INFO L225 Difference]: With dead ends: 29 [2021-05-06 10:38:03,776 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 10:38:03,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:38:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 10:38:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 10:38:03,800 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) [2021-05-06 10:38:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 10:38:03,803 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 10:38:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:03,804 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 10:38:03,804 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) [2021-05-06 10:38:03,804 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 10:38:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 10:38:03,805 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:03,806 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:38:03,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:38:03,806 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:03,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash 793962506, now seen corresponding path program 1 times [2021-05-06 10:38:03,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:03,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018787681] [2021-05-06 10:38:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:03,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:03,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035039893] [2021-05-06 10:38:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:38:03,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:38:03,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:04,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:38:04,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:04,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018787681] [2021-05-06 10:38:04,055 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:04,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035039893] [2021-05-06 10:38:04,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035039893] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:38:04,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:38:04,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:38:04,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333851340] [2021-05-06 10:38:04,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:38:04,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:04,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:38:04,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:38:04,057 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:38:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:04,087 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2021-05-06 10:38:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:38:04,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 10:38:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:04,088 INFO L225 Difference]: With dead ends: 33 [2021-05-06 10:38:04,088 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 10:38:04,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:38:04,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 10:38:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 10:38:04,092 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) [2021-05-06 10:38:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 10:38:04,093 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 10:38:04,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:04,094 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 10:38:04,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:38:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 10:38:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 10:38:04,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:04,094 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] [2021-05-06 10:38:04,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:38:04,305 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:04,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:04,305 INFO L82 PathProgramCache]: Analyzing trace with hash -503871754, now seen corresponding path program 1 times [2021-05-06 10:38:04,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:04,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864062010] [2021-05-06 10:38:04,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:04,314 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:04,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18865216] [2021-05-06 10:38:04,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:38:04,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:38:04,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:04,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 10:38:04,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:04,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864062010] [2021-05-06 10:38:04,489 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:04,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18865216] [2021-05-06 10:38:04,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18865216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:04,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:04,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:38:04,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703174650] [2021-05-06 10:38:04,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:38:04,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:04,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:38:04,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:38:04,490 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:38:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:04,550 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-06 10:38:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:38:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-06 10:38:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:04,551 INFO L225 Difference]: With dead ends: 40 [2021-05-06 10:38:04,551 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 10:38:04,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:38:04,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 10:38:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 10:38:04,555 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) [2021-05-06 10:38:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 10:38:04,559 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 10:38:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:04,559 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 10:38:04,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 10:38:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 10:38:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:38:04,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:04,562 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] [2021-05-06 10:38:04,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:04,780 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:04,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1813677706, now seen corresponding path program 2 times [2021-05-06 10:38:04,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:04,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795031464] [2021-05-06 10:38:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:04,788 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:04,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110475848] [2021-05-06 10:38:04,789 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 [2021-05-06 10:38:04,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:38:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:38:04,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:38:04,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:05,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,099 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 10:38:05,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:05,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795031464] [2021-05-06 10:38:05,100 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:05,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110475848] [2021-05-06 10:38:05,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110475848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:05,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:05,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:38:05,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104840169] [2021-05-06 10:38:05,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:38:05,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:05,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:38:05,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:38:05,102 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) [2021-05-06 10:38:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:05,221 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 10:38:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:38:05,222 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 [2021-05-06 10:38:05,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:05,225 INFO L225 Difference]: With dead ends: 49 [2021-05-06 10:38:05,225 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:38:05,228 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:38:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:38:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 10:38:05,238 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) [2021-05-06 10:38:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 10:38:05,241 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 10:38:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:05,242 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 10:38:05,242 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) [2021-05-06 10:38:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 10:38:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 10:38:05,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:05,244 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] [2021-05-06 10:38:05,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:05,451 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1285656823, now seen corresponding path program 1 times [2021-05-06 10:38:05,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:05,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782071315] [2021-05-06 10:38:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:05,459 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:05,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827489520] [2021-05-06 10:38:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:38:05,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:38:05,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:38:05,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:38:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:38:05,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:38:05,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782071315] [2021-05-06 10:38:05,629 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:38:05,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827489520] [2021-05-06 10:38:05,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827489520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:38:05,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:38:05,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:38:05,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428985255] [2021-05-06 10:38:05,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:38:05,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:38:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:38:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:38:05,631 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:38:05,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:38:05,675 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2021-05-06 10:38:05,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:38:05,675 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 10:38:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:38:05,677 INFO L225 Difference]: With dead ends: 52 [2021-05-06 10:38:05,677 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:38:05,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:38:05,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:38:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:38:05,680 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) [2021-05-06 10:38:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 10:38:05,680 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 10:38:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:38:05,681 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 10:38:05,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 10:38:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 10:38:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 10:38:05,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:38:05,681 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] [2021-05-06 10:38:05,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:38:05,889 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:38:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:38:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash -241657738, now seen corresponding path program 3 times [2021-05-06 10:38:05,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:38:05,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635856220] [2021-05-06 10:38:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:38:05,897 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:38:05,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090707743] [2021-05-06 10:38:05,897 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 [2021-05-06 10:42:20,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:42:20,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:20,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:42:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:20,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:20,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:20,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 10:42:20,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:20,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635856220] [2021-05-06 10:42:20,603 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:20,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090707743] [2021-05-06 10:42:20,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090707743] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:20,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:20,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:42:20,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284858046] [2021-05-06 10:42:20,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:42:20,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:20,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:42:20,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:42:20,605 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) [2021-05-06 10:42:20,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:20,723 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-06 10:42:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:42:20,724 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 [2021-05-06 10:42:20,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:20,724 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:42:20,724 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 10:42:20,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:42:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 10:42:20,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 10:42:20,727 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) [2021-05-06 10:42:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 10:42:20,728 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 10:42:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:20,728 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 10:42:20,728 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) [2021-05-06 10:42:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 10:42:20,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 10:42:20,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:20,728 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] [2021-05-06 10:42:20,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 10:42:20,933 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:20,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:20,933 INFO L82 PathProgramCache]: Analyzing trace with hash -542323485, now seen corresponding path program 2 times [2021-05-06 10:42:20,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:20,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657570207] [2021-05-06 10:42:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:20,940 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:20,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246511232] [2021-05-06 10:42:20,940 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 [2021-05-06 10:42:21,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:42:21,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 10:42:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:21,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 10:42:21,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:21,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657570207] [2021-05-06 10:42:21,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:21,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246511232] [2021-05-06 10:42:21,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246511232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:21,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:21,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:42:21,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703101348] [2021-05-06 10:42:21,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:42:21,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:21,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:42:21,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:42:21,229 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:42:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:21,285 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-06 10:42:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:42:21,285 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-06 10:42:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:21,286 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:42:21,286 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:42:21,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:42:21,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:42:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:42:21,298 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) [2021-05-06 10:42:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 10:42:21,299 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 10:42:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:21,299 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 10:42:21,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 10:42:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 10:42:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 10:42:21,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:21,301 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] [2021-05-06 10:42:21,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:42:21,509 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:21,510 INFO L82 PathProgramCache]: Analyzing trace with hash -2094100617, now seen corresponding path program 3 times [2021-05-06 10:42:21,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:21,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630823889] [2021-05-06 10:42:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:21,522 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:21,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063597621] [2021-05-06 10:42:21,523 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 [2021-05-06 10:42:21,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:42:21,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:42:21,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:21,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 10:42:21,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:21,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630823889] [2021-05-06 10:42:21,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:21,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063597621] [2021-05-06 10:42:21,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063597621] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:21,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:21,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:42:21,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198990431] [2021-05-06 10:42:21,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:42:21,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:21,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:42:21,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:42:21,928 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:42:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:21,990 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-06 10:42:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:42:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-06 10:42:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:21,994 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:42:21,994 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 10:42:21,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:42:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 10:42:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 10:42:21,998 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) [2021-05-06 10:42:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-06 10:42:21,998 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-06 10:42:21,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:21,999 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-06 10:42:21,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 10:42:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-06 10:42:22,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 10:42:22,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:22,002 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] [2021-05-06 10:42:22,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:42:22,211 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:22,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:22,211 INFO L82 PathProgramCache]: Analyzing trace with hash -826507677, now seen corresponding path program 4 times [2021-05-06 10:42:22,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:22,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079134991] [2021-05-06 10:42:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:22,218 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:22,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428949313] [2021-05-06 10:42:22,218 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 [2021-05-06 10:42:22,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:42:22,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:42:22,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:42:22,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:42:22,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:42:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 10:42:22,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:42:22,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079134991] [2021-05-06 10:42:22,473 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:42:22,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428949313] [2021-05-06 10:42:22,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428949313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:42:22,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:42:22,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:42:22,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86043484] [2021-05-06 10:42:22,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:42:22,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:42:22,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:42:22,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:42:22,476 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:42:22,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:42:22,556 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-06 10:42:22,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:42:22,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-05-06 10:42:22,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:42:22,557 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:42:22,557 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 10:42:22,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:42:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 10:42:22,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-06 10:42:22,564 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) [2021-05-06 10:42:22,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 10:42:22,566 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-06 10:42:22,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:42:22,566 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 10:42:22,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-05-06 10:42:22,566 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 10:42:22,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:42:22,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:42:22,569 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] [2021-05-06 10:42:22,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 10:42:22,787 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:42:22,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:42:22,787 INFO L82 PathProgramCache]: Analyzing trace with hash -170119689, now seen corresponding path program 5 times [2021-05-06 10:42:22,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:42:22,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441523398] [2021-05-06 10:42:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:42:22,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:42:22,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675063787] [2021-05-06 10:42:22,805 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