/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/cohencu-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:33:22,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:33:22,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:33:22,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:33:22,155 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:33:22,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:33:22,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:33:22,167 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:33:22,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:33:22,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:33:22,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:33:22,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:33:22,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:33:22,177 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:33:22,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:33:22,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:33:22,183 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:33:22,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:33:22,184 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:33:22,188 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:33:22,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:33:22,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:33:22,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:33:22,193 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:33:22,197 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 19:33:22,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:33:22,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:33:22,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:33:22,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:33:22,220 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:33:22,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:33:22,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:33:22,223 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:33:22,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:33:22,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:33:22,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:33:22,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:33:22,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:33:22,223 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:33:22,224 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:33:22,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:33:22,224 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:33:22,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:33:22,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:33:22,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:33:22,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:33:22,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:33:22,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:33:22,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:33:22,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:33:22,227 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:33:22,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:33:22,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:33:22,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:33:22,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:33:22,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:33:22,502 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:33:22,503 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2021-05-02 19:33:22,544 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7493c705/ad60ef30ab3b4a8fa7331983377930f5/FLAG2fae239ff [2021-05-02 19:33:22,925 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:33:22,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2021-05-02 19:33:22,930 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7493c705/ad60ef30ab3b4a8fa7331983377930f5/FLAG2fae239ff [2021-05-02 19:33:23,338 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7493c705/ad60ef30ab3b4a8fa7331983377930f5 [2021-05-02 19:33:23,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:33:23,341 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:33:23,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:33:23,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:33:23,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:33:23,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@353117be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23, skipping insertion in model container [2021-05-02 19:33:23,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:33:23,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:33:23,462 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/cohencu-ll_unwindbound50.c[596,609] [2021-05-02 19:33:23,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:33:23,496 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:33:23,503 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/cohencu-ll_unwindbound50.c[596,609] [2021-05-02 19:33:23,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:33:23,522 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:33:23,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23 WrapperNode [2021-05-02 19:33:23,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:33:23,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:33:23,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:33:23,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:33:23,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:33:23,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:33:23,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:33:23,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:33:23,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23" (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 19:33:23,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:33:23,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:33:23,646 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:33:23,646 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:33:23,647 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:33:23,647 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:33:23,647 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:33:23,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:33:23,647 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:33:23,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:33:23,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 19:33:23,648 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:33:23,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:33:23,648 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:33:23,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:33:23,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:33:23,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:33:23,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:33:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:33:23,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:33:23,899 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:33:23,899 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 19:33:23,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:33:23 BoogieIcfgContainer [2021-05-02 19:33:23,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:33:23,908 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:33:23,909 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:33:23,909 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:33:23,911 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:33:23" (1/1) ... [2021-05-02 19:33:23,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:33:23 BasicIcfg [2021-05-02 19:33:23,930 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:33:23,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:33:23,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:33:23,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:33:23,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:33:23" (1/4) ... [2021-05-02 19:33:23,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c5159c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:33:23, skipping insertion in model container [2021-05-02 19:33:23,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:33:23" (2/4) ... [2021-05-02 19:33:23,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c5159c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:33:23, skipping insertion in model container [2021-05-02 19:33:23,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:33:23" (3/4) ... [2021-05-02 19:33:23,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c5159c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:33:23, skipping insertion in model container [2021-05-02 19:33:23,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:33:23" (4/4) ... [2021-05-02 19:33:23,935 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound50.cJordan [2021-05-02 19:33:23,939 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:33:23,942 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:33:23,953 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:33:23,974 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:33:23,975 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:33:23,975 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:33:23,975 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:33:23,975 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:33:23,975 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:33:23,975 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:33:23,975 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:33:23,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:33:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:33:23,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:23,995 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:23,995 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:23,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1427487266, now seen corresponding path program 1 times [2021-05-02 19:33:24,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:24,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585238805] [2021-05-02 19:33:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:24,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:33:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:33:24,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:24,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585238805] [2021-05-02 19:33:24,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585238805] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:33:24,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:33:24,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:33:24,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966131813] [2021-05-02 19:33:24,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:33:24,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:24,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:33:24,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:33:24,249 INFO L87 Difference]: Start difference. First operand has 31 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:33:24,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:24,356 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-05-02 19:33:24,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:33:24,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:33:24,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:24,362 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:33:24,362 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 19:33:24,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:33:24,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 19:33:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 19:33:24,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:33:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2021-05-02 19:33:24,390 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 11 [2021-05-02 19:33:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:24,391 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2021-05-02 19:33:24,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:33:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2021-05-02 19:33:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:33:24,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:24,391 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:24,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:33:24,392 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1331862890, now seen corresponding path program 1 times [2021-05-02 19:33:24,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:24,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510689136] [2021-05-02 19:33:24,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:24,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:33:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:33:24,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:24,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510689136] [2021-05-02 19:33:24,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510689136] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:33:24,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:33:24,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:33:24,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565205019] [2021-05-02 19:33:24,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:33:24,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:24,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:33:24,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:33:24,480 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:33:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:24,635 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-05-02 19:33:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:33:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:33:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:24,636 INFO L225 Difference]: With dead ends: 28 [2021-05-02 19:33:24,636 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 19:33:24,637 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:33:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 19:33:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 19:33:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:33:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2021-05-02 19:33:24,641 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 12 [2021-05-02 19:33:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:24,642 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2021-05-02 19:33:24,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:33:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2021-05-02 19:33:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:33:24,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:24,642 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:24,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:33:24,642 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:24,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1332935366, now seen corresponding path program 1 times [2021-05-02 19:33:24,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:24,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509006227] [2021-05-02 19:33:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:24,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:33:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:33:24,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:24,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509006227] [2021-05-02 19:33:24,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509006227] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:33:24,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:33:24,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:33:24,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104001435] [2021-05-02 19:33:24,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:33:24,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:24,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:33:24,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:33:24,730 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:33:24,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:24,936 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2021-05-02 19:33:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:33:24,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:33:24,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:24,939 INFO L225 Difference]: With dead ends: 32 [2021-05-02 19:33:24,939 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 19:33:24,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:24,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 19:33:24,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 19:33:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:33:24,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 19:33:24,955 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-02 19:33:24,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:24,955 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 19:33:24,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:33:24,956 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 19:33:24,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:33:24,956 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:24,956 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:24,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 19:33:24,957 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:24,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1273314772, now seen corresponding path program 1 times [2021-05-02 19:33:24,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:24,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291799815] [2021-05-02 19:33:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:24,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:24,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652946082] [2021-05-02 19:33:24,972 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 19:33:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:25,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:33:25,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:33:25,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291799815] [2021-05-02 19:33:25,169 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652946082] [2021-05-02 19:33:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652946082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:25,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:25,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:33:25,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86682536] [2021-05-02 19:33:25,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:33:25,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:25,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:33:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:33:25,170 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:33:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:25,368 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-05-02 19:33:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:33:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-02 19:33:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:25,369 INFO L225 Difference]: With dead ends: 52 [2021-05-02 19:33:25,369 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 19:33:25,369 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:25,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 19:33:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 19:33:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:33:25,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2021-05-02 19:33:25,374 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 17 [2021-05-02 19:33:25,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:25,375 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2021-05-02 19:33:25,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:33:25,375 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2021-05-02 19:33:25,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:33:25,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:25,375 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:25,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:25,591 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:25,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:25,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1649805282, now seen corresponding path program 1 times [2021-05-02 19:33:25,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:25,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401974671] [2021-05-02 19:33:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:25,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:25,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145467412] [2021-05-02 19:33:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:33:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:25,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:33:25,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:33:25,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401974671] [2021-05-02 19:33:25,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:25,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145467412] [2021-05-02 19:33:25,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145467412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:25,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:25,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:33:25,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413558972] [2021-05-02 19:33:25,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:33:25,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:33:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:33:25,744 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:33:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:25,888 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2021-05-02 19:33:25,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:33:25,888 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-05-02 19:33:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:25,890 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:33:25,891 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:33:25,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:33:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 19:33:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:33:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 19:33:25,908 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 19:33:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:25,909 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 19:33:25,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:33:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 19:33:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 19:33:25,910 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:25,910 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:26,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:26,114 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1442767915, now seen corresponding path program 1 times [2021-05-02 19:33:26,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:26,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674489501] [2021-05-02 19:33:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:26,132 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:26,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719513419] [2021-05-02 19:33:26,132 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 19:33:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:26,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:33:26,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:33:26,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:26,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674489501] [2021-05-02 19:33:26,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:26,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719513419] [2021-05-02 19:33:26,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719513419] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:26,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:26,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:33:26,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39094186] [2021-05-02 19:33:26,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:33:26,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:26,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:33:26,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:33:26,267 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:33:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:26,422 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2021-05-02 19:33:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:33:26,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 19:33:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:26,424 INFO L225 Difference]: With dead ends: 60 [2021-05-02 19:33:26,424 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 19:33:26,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 19:33:26,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 19:33:26,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:33:26,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-05-02 19:33:26,428 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 27 [2021-05-02 19:33:26,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:26,428 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-05-02 19:33:26,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:33:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-05-02 19:33:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 19:33:26,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:26,429 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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 19:33:26,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:26,633 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:26,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1251454759, now seen corresponding path program 1 times [2021-05-02 19:33:26,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:26,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767448169] [2021-05-02 19:33:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:26,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:26,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438070793] [2021-05-02 19:33:26,641 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 19:33:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:26,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:33:26,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:26,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:26,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:26,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:26,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:26,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:26,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:26,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:26,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-05-02 19:33:26,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:26,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767448169] [2021-05-02 19:33:26,782 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:26,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438070793] [2021-05-02 19:33:26,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438070793] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:26,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:26,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 19:33:26,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27595843] [2021-05-02 19:33:26,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:33:26,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:26,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:33:26,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:33:26,783 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:33:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:26,815 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2021-05-02 19:33:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:33:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 19:33:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:26,816 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:33:26,816 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:33:26,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:33:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:33:26,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 19:33:26,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 19:33:26,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-05-02 19:33:26,819 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 45 [2021-05-02 19:33:26,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:26,820 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-05-02 19:33:26,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:33:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-05-02 19:33:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 19:33:26,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:26,821 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:27,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:27,029 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:27,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1899744846, now seen corresponding path program 1 times [2021-05-02 19:33:27,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:27,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477682012] [2021-05-02 19:33:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:27,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:27,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965667389] [2021-05-02 19:33:27,036 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 19:33:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:27,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 19:33:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 19:33:27,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:27,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477682012] [2021-05-02 19:33:27,210 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:27,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965667389] [2021-05-02 19:33:27,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965667389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:27,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:27,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:33:27,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691732170] [2021-05-02 19:33:27,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:33:27,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:33:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:33:27,211 INFO L87 Difference]: Start difference. First operand 56 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:33:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:27,417 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-05-02 19:33:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:33:27,417 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 19:33:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:27,418 INFO L225 Difference]: With dead ends: 76 [2021-05-02 19:33:27,418 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 19:33:27,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:33:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 19:33:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 19:33:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 39 states have internal predecessors, (41), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:33:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2021-05-02 19:33:27,425 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 45 [2021-05-02 19:33:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:27,425 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2021-05-02 19:33:27,425 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, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:33:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2021-05-02 19:33:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:33:27,426 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:27,426 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:27,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:27,633 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:27,633 INFO L82 PathProgramCache]: Analyzing trace with hash 400776220, now seen corresponding path program 2 times [2021-05-02 19:33:27,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:27,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426249438] [2021-05-02 19:33:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:27,639 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:27,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291550436] [2021-05-02 19:33:27,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:27,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:33:27,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:27,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:33:27,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 19:33:27,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:27,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426249438] [2021-05-02 19:33:27,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:27,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291550436] [2021-05-02 19:33:27,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291550436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:27,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:27,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:33:27,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616941562] [2021-05-02 19:33:27,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:33:27,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:27,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:33:27,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:33:27,825 INFO L87 Difference]: Start difference. First operand 75 states and 95 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:33:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:27,996 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2021-05-02 19:33:27,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:33:27,996 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2021-05-02 19:33:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:27,997 INFO L225 Difference]: With dead ends: 80 [2021-05-02 19:33:27,997 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:33:27,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:33:27,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:33:28,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:33:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:33:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 95 transitions. [2021-05-02 19:33:28,001 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 95 transitions. Word has length 50 [2021-05-02 19:33:28,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:28,002 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 95 transitions. [2021-05-02 19:33:28,002 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, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:33:28,002 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 95 transitions. [2021-05-02 19:33:28,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 19:33:28,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:28,003 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:28,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:28,217 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:28,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:28,217 INFO L82 PathProgramCache]: Analyzing trace with hash 999510626, now seen corresponding path program 1 times [2021-05-02 19:33:28,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:28,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541545763] [2021-05-02 19:33:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:28,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:28,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702588581] [2021-05-02 19:33:28,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:28,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:33:28,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:28,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 9 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:33:28,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:28,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541545763] [2021-05-02 19:33:28,699 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:28,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702588581] [2021-05-02 19:33:28,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702588581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:28,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:28,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:33:28,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273959454] [2021-05-02 19:33:28,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:33:28,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:28,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:33:28,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:28,700 INFO L87 Difference]: Start difference. First operand 78 states and 95 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:33:36,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:36,951 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2021-05-02 19:33:36,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:33:36,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2021-05-02 19:33:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:36,952 INFO L225 Difference]: With dead ends: 82 [2021-05-02 19:33:36,952 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 19:33:36,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 139.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:33:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 19:33:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 19:33:36,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:33:36,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2021-05-02 19:33:36,957 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 71 [2021-05-02 19:33:36,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:36,957 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2021-05-02 19:33:36,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:33:36,957 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2021-05-02 19:33:36,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 19:33:36,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:36,958 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:37,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:33:37,174 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:37,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1401496737, now seen corresponding path program 2 times [2021-05-02 19:33:37,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:37,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918387580] [2021-05-02 19:33:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:37,184 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:37,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788982476] [2021-05-02 19:33:37,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:37,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:33:37,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:37,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:33:37,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:37,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 60 proven. 112 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 19:33:37,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:37,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918387580] [2021-05-02 19:33:37,361 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:37,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788982476] [2021-05-02 19:33:37,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788982476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:37,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:37,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:33:37,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252762773] [2021-05-02 19:33:37,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:33:37,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:37,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:33:37,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:33:37,362 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:33:37,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:37,422 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2021-05-02 19:33:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:33:37,422 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2021-05-02 19:33:37,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:37,423 INFO L225 Difference]: With dead ends: 90 [2021-05-02 19:33:37,423 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 19:33:37,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:33:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 19:33:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-05-02 19:33:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:33:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2021-05-02 19:33:37,427 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 73 [2021-05-02 19:33:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:37,427 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2021-05-02 19:33:37,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:33:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2021-05-02 19:33:37,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 19:33:37,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:37,428 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:37,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:33:37,645 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2049786824, now seen corresponding path program 3 times [2021-05-02 19:33:37,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:37,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982029847] [2021-05-02 19:33:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:37,650 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:37,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316851422] [2021-05-02 19:33:37,651 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:37,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:33:37,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:33:37,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:33:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 51 proven. 17 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:33:37,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:37,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982029847] [2021-05-02 19:33:37,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:37,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316851422] [2021-05-02 19:33:37,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316851422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:37,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:37,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:33:37,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740725676] [2021-05-02 19:33:37,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:33:37,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:37,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:33:37,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:37,886 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:33:38,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:38,288 INFO L93 Difference]: Finished difference Result 108 states and 133 transitions. [2021-05-02 19:33:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:33:38,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 73 [2021-05-02 19:33:38,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:38,289 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:33:38,289 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 19:33:38,290 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:33:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 19:33:38,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 19:33:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 58 states have internal predecessors, (61), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 19:33:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 132 transitions. [2021-05-02 19:33:38,295 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 132 transitions. Word has length 73 [2021-05-02 19:33:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:38,295 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 132 transitions. [2021-05-02 19:33:38,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:33:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 132 transitions. [2021-05-02 19:33:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 19:33:38,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:38,296 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:38,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:38,505 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:38,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:38,505 INFO L82 PathProgramCache]: Analyzing trace with hash -601883655, now seen corresponding path program 1 times [2021-05-02 19:33:38,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:38,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341458854] [2021-05-02 19:33:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:38,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:38,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301175645] [2021-05-02 19:33:38,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:33:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:33:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:33:38,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:33:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 53 proven. 12 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 19:33:38,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:33:38,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341458854] [2021-05-02 19:33:38,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:33:38,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301175645] [2021-05-02 19:33:38,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301175645] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:33:38,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:33:38,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:33:38,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568436416] [2021-05-02 19:33:38,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:33:38,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:33:38,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:33:38,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:33:38,734 INFO L87 Difference]: Start difference. First operand 107 states and 132 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:33:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:33:38,951 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2021-05-02 19:33:38,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:33:38,952 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 76 [2021-05-02 19:33:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:33:38,953 INFO L225 Difference]: With dead ends: 111 [2021-05-02 19:33:38,953 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 19:33:38,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:33:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 19:33:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 19:33:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 37 states have call successors, (37), 16 states have call predecessors, (37), 14 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 19:33:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2021-05-02 19:33:38,966 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 76 [2021-05-02 19:33:38,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:33:38,966 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2021-05-02 19:33:38,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:33:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2021-05-02 19:33:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 19:33:38,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:33:38,969 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:33:39,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:33:39,185 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:33:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:33:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1157335722, now seen corresponding path program 4 times [2021-05-02 19:33:39,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:33:39,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005780418] [2021-05-02 19:33:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:33:39,190 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:33:39,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165252346] [2021-05-02 19:33:39,191 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true