/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/cohendiv-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:46:10,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:46:10,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:46:10,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:46:10,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:46:10,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:46:10,339 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:46:10,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:46:10,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:46:10,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:46:10,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:46:10,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:46:10,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:46:10,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:46:10,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:46:10,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:46:10,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:46:10,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:46:10,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:46:10,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:46:10,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:46:10,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:46:10,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:46:10,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:46:10,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:46:10,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:46:10,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:46:10,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:46:10,368 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:46:10,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:46:10,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:46:10,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:46:10,385 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:46:10,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:46:10,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:46:10,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:46:10,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:46:10,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:46:10,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:46:10,387 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:46:10,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:46:10,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:46:10,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:46:10,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:46:10,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:46:10,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:46:10,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:46:10,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:46:10,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:46:10,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:46:10,407 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:46:10,407 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:46:10,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:46:10,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:46:10,748 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:46:10,749 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:46:10,750 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:46:10,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2021-05-02 19:46:10,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79f56c537/fd92ad9ff9f0494ab7ff2745ace110fb/FLAG856f16860 [2021-05-02 19:46:11,332 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:46:11,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2021-05-02 19:46:11,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79f56c537/fd92ad9ff9f0494ab7ff2745ace110fb/FLAG856f16860 [2021-05-02 19:46:11,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79f56c537/fd92ad9ff9f0494ab7ff2745ace110fb [2021-05-02 19:46:11,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:46:11,813 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:46:11,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:46:11,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:46:11,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:46:11,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:46:11" (1/1) ... [2021-05-02 19:46:11,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b174ec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:11, skipping insertion in model container [2021-05-02 19:46:11,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:46:11" (1/1) ... [2021-05-02 19:46:11,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:46:11,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:46:11,984 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/cohendiv-ll_valuebound1.c[576,589] [2021-05-02 19:46:11,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:46:12,003 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:46:12,054 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/cohendiv-ll_valuebound1.c[576,589] [2021-05-02 19:46:12,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:46:12,098 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:46:12,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12 WrapperNode [2021-05-02 19:46:12,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:46:12,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:46:12,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:46:12,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:46:12,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12" (1/1) ... [2021-05-02 19:46:12,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12" (1/1) ... [2021-05-02 19:46:12,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12" (1/1) ... [2021-05-02 19:46:12,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12" (1/1) ... [2021-05-02 19:46:12,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12" (1/1) ... [2021-05-02 19:46:12,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12" (1/1) ... [2021-05-02 19:46:12,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12" (1/1) ... [2021-05-02 19:46:12,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:46:12,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:46:12,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:46:12,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:46:12,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12" (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 19:46:12,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:46:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:46:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:46:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:46:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:46:12,231 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:46:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:46:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:46:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:46:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:46:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:46:12,232 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:46:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:46:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:46:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:46:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:46:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:46:12,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:46:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:46:12,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:46:12,535 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:46:12,535 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:46:12,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:46:12 BoogieIcfgContainer [2021-05-02 19:46:12,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:46:12,537 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:46:12,538 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:46:12,538 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:46:12,541 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:46:12" (1/1) ... [2021-05-02 19:46:12,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:46:12 BasicIcfg [2021-05-02 19:46:12,556 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:46:12,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:46:12,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:46:12,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:46:12,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:46:11" (1/4) ... [2021-05-02 19:46:12,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c50d603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:46:12, skipping insertion in model container [2021-05-02 19:46:12,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:46:12" (2/4) ... [2021-05-02 19:46:12,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c50d603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:46:12, skipping insertion in model container [2021-05-02 19:46:12,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:46:12" (3/4) ... [2021-05-02 19:46:12,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c50d603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:46:12, skipping insertion in model container [2021-05-02 19:46:12,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:46:12" (4/4) ... [2021-05-02 19:46:12,563 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound1.cJordan [2021-05-02 19:46:12,567 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:46:12,571 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:46:12,585 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:46:12,609 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:46:12,609 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:46:12,609 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:46:12,610 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:46:12,610 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:46:12,610 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:46:12,610 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:46:12,610 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:46:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:46:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:46:12,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:12,644 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:12,644 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:12,655 INFO L82 PathProgramCache]: Analyzing trace with hash 795680375, now seen corresponding path program 1 times [2021-05-02 19:46:12,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:12,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648385962] [2021-05-02 19:46:12,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:12,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:46:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:12,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:46:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 19:46:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:12,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 19:46:12,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:12,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:46:12,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:12,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648385962] [2021-05-02 19:46:13,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648385962] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:46:13,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:46:13,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:46:13,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235460117] [2021-05-02 19:46:13,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:46:13,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:13,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:46:13,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:46:13,018 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 19:46:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:13,180 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-02 19:46:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:46:13,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 19:46:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:13,195 INFO L225 Difference]: With dead ends: 39 [2021-05-02 19:46:13,195 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:46:13,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:46:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:46:13,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 19:46:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:46:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 19:46:13,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-02 19:46:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:13,256 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 19:46:13,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 19:46:13,257 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 19:46:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:46:13,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:13,258 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:13,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:46:13,259 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:13,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:13,262 INFO L82 PathProgramCache]: Analyzing trace with hash 797557208, now seen corresponding path program 1 times [2021-05-02 19:46:13,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:13,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917872493] [2021-05-02 19:46:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:13,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:13,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682581661] [2021-05-02 19:46:13,304 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 19:46:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:13,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:46:13,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:13,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:13,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:13,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:13,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:13,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:46:13,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:13,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917872493] [2021-05-02 19:46:13,714 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:13,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682581661] [2021-05-02 19:46:13,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682581661] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:46:13,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:46:13,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 19:46:13,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581989729] [2021-05-02 19:46:13,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:46:13,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:13,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:46:13,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:46:13,717 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:46:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:13,835 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-02 19:46:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:46:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 19:46:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:13,837 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:46:13,838 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:46:13,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:46:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:46:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 19:46:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:46:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 19:46:13,845 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-02 19:46:13,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:13,846 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 19:46:13,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:46:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 19:46:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 19:46:13,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:13,847 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:14,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:46:14,065 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:14,066 INFO L82 PathProgramCache]: Analyzing trace with hash 648866686, now seen corresponding path program 1 times [2021-05-02 19:46:14,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:14,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623813433] [2021-05-02 19:46:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:14,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:14,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277488006] [2021-05-02 19:46:14,077 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 19:46:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:14,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:46:14,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:14,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:46:14,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:14,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623813433] [2021-05-02 19:46:14,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:14,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277488006] [2021-05-02 19:46:14,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277488006] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:46:14,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:46:14,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 19:46:14,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549267203] [2021-05-02 19:46:14,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:46:14,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:14,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:46:14,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:46:14,440 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:46:14,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:14,604 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-05-02 19:46:14,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:46:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2021-05-02 19:46:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:14,609 INFO L225 Difference]: With dead ends: 55 [2021-05-02 19:46:14,610 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:46:14,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:46:14,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:46:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 19:46:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:46:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-02 19:46:14,638 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-02 19:46:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:14,638 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-02 19:46:14,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 19:46:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-02 19:46:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 19:46:14,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:14,640 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:14,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:14,841 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:14,841 INFO L82 PathProgramCache]: Analyzing trace with hash 619469170, now seen corresponding path program 1 times [2021-05-02 19:46:14,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:14,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630338863] [2021-05-02 19:46:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:14,850 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:14,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [939478904] [2021-05-02 19:46:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:14,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:14,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:46:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:14,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:14,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 19:46:15,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:15,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630338863] [2021-05-02 19:46:15,110 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:15,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939478904] [2021-05-02 19:46:15,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939478904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:46:15,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:46:15,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 19:46:15,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420899347] [2021-05-02 19:46:15,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:46:15,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:46:15,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:46:15,114 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:46:15,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:15,253 INFO L93 Difference]: Finished difference Result 77 states and 103 transitions. [2021-05-02 19:46:15,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:46:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-02 19:46:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:15,256 INFO L225 Difference]: With dead ends: 77 [2021-05-02 19:46:15,257 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 19:46:15,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:46:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 19:46:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-02 19:46:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 19:46:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2021-05-02 19:46:15,281 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2021-05-02 19:46:15,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:15,281 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2021-05-02 19:46:15,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:46:15,282 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2021-05-02 19:46:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 19:46:15,285 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:15,285 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:15,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:15,509 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:15,509 INFO L82 PathProgramCache]: Analyzing trace with hash -810208713, now seen corresponding path program 1 times [2021-05-02 19:46:15,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:15,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614745303] [2021-05-02 19:46:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:15,521 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:15,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680060416] [2021-05-02 19:46:15,522 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 19:46:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:15,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:46:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:15,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 19:46:15,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:15,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614745303] [2021-05-02 19:46:15,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:15,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680060416] [2021-05-02 19:46:15,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680060416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:15,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:15,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:46:15,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912430972] [2021-05-02 19:46:15,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:46:15,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:46:15,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:46:15,825 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:46:15,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:15,920 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-05-02 19:46:15,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:46:15,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 19:46:15,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:15,922 INFO L225 Difference]: With dead ends: 53 [2021-05-02 19:46:15,922 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 19:46:15,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:46:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 19:46:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-02 19:46:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 31 states have internal predecessors, (31), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 19:46:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-05-02 19:46:15,927 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 56 [2021-05-02 19:46:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:15,927 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-05-02 19:46:15,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:46:15,928 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-05-02 19:46:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 19:46:15,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:15,929 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:16,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:16,137 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:16,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1603019557, now seen corresponding path program 1 times [2021-05-02 19:46:16,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:16,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207304384] [2021-05-02 19:46:16,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:16,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:16,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771351023] [2021-05-02 19:46:16,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:46:16,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:46:16,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:16,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:46:16,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:16,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207304384] [2021-05-02 19:46:16,576 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:16,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771351023] [2021-05-02 19:46:16,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771351023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:16,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:16,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:46:16,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837940819] [2021-05-02 19:46:16,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:46:16,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:16,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:46:16,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:46:16,578 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 19:46:16,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:16,724 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-02 19:46:16,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:46:16,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 63 [2021-05-02 19:46:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:16,725 INFO L225 Difference]: With dead ends: 46 [2021-05-02 19:46:16,725 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:46:16,726 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:46:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:46:16,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:46:16,728 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 19:46:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:46:16,728 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2021-05-02 19:46:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:16,729 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:46:16,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 19:46:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:46:16,729 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:46:16,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:46:16,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:46:16 BasicIcfg [2021-05-02 19:46:16,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:46:16,958 INFO L168 Benchmark]: Toolchain (without parser) took 5146.07 ms. Allocated memory was 192.9 MB in the beginning and 247.5 MB in the end (delta: 54.5 MB). Free memory was 158.0 MB in the beginning and 217.2 MB in the end (delta: -59.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:46:16,959 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 192.9 MB. Free memory was 174.8 MB in the beginning and 174.7 MB in the end (delta: 106.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:46:16,959 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.51 ms. Allocated memory is still 192.9 MB. Free memory was 157.8 MB in the beginning and 176.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:16,959 INFO L168 Benchmark]: Boogie Preprocessor took 44.92 ms. Allocated memory is still 192.9 MB. Free memory was 176.3 MB in the beginning and 174.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:16,959 INFO L168 Benchmark]: RCFGBuilder took 385.35 ms. Allocated memory is still 192.9 MB. Free memory was 174.8 MB in the beginning and 159.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:16,959 INFO L168 Benchmark]: IcfgTransformer took 19.08 ms. Allocated memory is still 192.9 MB. Free memory was 159.0 MB in the beginning and 157.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:46:16,959 INFO L168 Benchmark]: TraceAbstraction took 4400.26 ms. Allocated memory was 192.9 MB in the beginning and 247.5 MB in the end (delta: 54.5 MB). Free memory was 156.9 MB in the beginning and 217.2 MB in the end (delta: -60.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:46:16,960 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 192.9 MB. Free memory was 174.8 MB in the beginning and 174.7 MB in the end (delta: 106.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 287.51 ms. Allocated memory is still 192.9 MB. Free memory was 157.8 MB in the beginning and 176.3 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.92 ms. Allocated memory is still 192.9 MB. Free memory was 176.3 MB in the beginning and 174.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 385.35 ms. Allocated memory is still 192.9 MB. Free memory was 174.8 MB in the beginning and 159.0 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.08 ms. Allocated memory is still 192.9 MB. Free memory was 159.0 MB in the beginning and 157.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4400.26 ms. Allocated memory was 192.9 MB in the beginning and 247.5 MB in the end (delta: 54.5 MB). Free memory was 156.9 MB in the beginning and 217.2 MB in the end (delta: -60.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4346.2ms, OverallIterations: 6, TraceHistogramMax: 7, EmptinessCheckTime: 25.4ms, AutomataDifference: 875.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 217 SDtfs, 166 SDslu, 819 SDs, 0 SdLazy, 496 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 520.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 236 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 504.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=4, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 88.7ms AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 80.3ms SsaConstructionTime, 205.5ms SatisfiabilityAnalysisTime, 1593.4ms InterpolantComputationTime, 248 NumberOfCodeBlocks, 248 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 242 ConstructedInterpolants, 0 QuantifiedInterpolants, 904 SizeOfPredicates, 25 NumberOfNonLiveVariables, 781 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 201/207 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...